The electrochemical oxidation of the biorefinery product 5-(hydroxymethyl)furfural (HMF) to 2,5-furandicarboxylic acid (FDCA), an important platform chemical for polymer industry, is receiving increasing interest. FDCA-based polymers such as polyethylene 2,5-furandicarboxylate (PEF) are sustainable candidates replacing terephthalate (PET). Herein, we report highly efficient electrocatalytic HMF FDCA, using Ni foam modified with high-surface-area nickel boride (Nix B) electrode. Constant...

Carbon corrosion at high anodic potentials is a major source of instability, especially in acidic electrolytes and impairs the long-term functionality electrodes. In-depth investigation carbon alkaline environment by means differential electrochemical mass spectrometry (DEMS) prevented conversion CO2 into CO32- . We report adaptation DEMS system for online detection as product electrolytes. A new cell design allows situ acidification electrolyte to release initially dissolved front membrane...

We report a simple, facile, and safe route for preparation of cobalt–cobalt phosphide (Co/Co2P) nanoparticles demonstrate their application as efficient low-cost catalysts electrochemical water splitting. The catalyst achieves good performance in catalyzing both the cathode anode half-cell water-splitting reactions 1.0 M KOH hydrogen evolution reaction an acidic electrolyte, 0.5 H2SO4. For oxygen KOH, current 10 mA cm–2 was attained at 0.39 V overpotential on glassy carbon electrode, while...

Abstract Highly active electrocatalysts for the oxygen evolution (OER) reaction are in most cases powder nanomaterials, which undergo substantial changes upon applying high potentials required high‐current‐density evolution. Owing to vigorous gas evolution, durability under OER conditions is disappointingly low as there no strategies securely fix catalysts onto electrode surfaces. Thus reliable studies of during or after often impaired. Herein, we propose use composites made from precursors...

Abstract The modification of nickel with boron or phosphorus leads to significant enhancement its electrocatalytic activity for the oxygen evolution reaction (OER). However, precise role guest elements, B and P, in enhancing OER host element (Ni) remains unclear. Herein, we present insight into P electrocatalysis by borides phosphides. apparent activation energy, E a *, on Ni 2 was 78.4 kJ/mol, 65.4 nanoparticles 94.0 thus revealing that both affect intrinsic nickel. XPS data revealed shifts...

Abstract NiFe layered double hydroxide (LDH) is inarguably the most active contemporary catalyst for oxygen evolution reaction under alkaline conditions. However, ability to sustain unattenuated performance challenging industrial conditions entailing high corrosivity of electrolyte (≈30 wt. % KOH), temperature (>80 °C) and current densities (>500 mA cm −2 ) ultimate criterion practical viability. This work evaluates chemical structural stability LDH at akin electrolysis, in 30 KOH 80...

The electrochemical water splitting commonly involves the cathodic hydrogen and anodic oxygen evolution reactions (OER). reaction is more energetically demanding kinetically sluggish represents bottleneck for a commercial competitiveness of production from water. Moreover, essentially waste product low value since primary interest to convert electrical energy into as storable carrier. We report on oxidation 5-hydroxymethylfurfural (HMF) afford valuable 2,5-furandicarboxylic acid (FDCA)...

The production of syngas (i.e., a mixture CO and H2) via the electrochemical reduction CO2 water can contribute to green transition various industrial sectors. Here we provide joint academic–industrial perspective on key technical economical differences concurrent H2 are generated in same electrolyzer cell) separated electrogenerated different electrolyzers) syngas. Using combination literature analysis, experimental data, techno-economic demonstrate that synthesis gas is notably less...

The impact of different doping levels boron-doped diamond on the surface functionalization was investigated by means electrochemical reduction aryldiazonium salts. grafting efficiency 4-nitrophenyl groups increased with boron (B/C ratio from 0 to 20 000 ppm). Controlled nitrophenyldiazonium used adjust amount immobilized single-stranded DNA strands at and further hybridization yield in dependence level. grafted nitro functions were electrochemically reduced amine moieties. Subsequent a...

Abstract Die elektrochemische Oxidation des Bioraffinerieproduktes 5‐(Hydroxymethyl)furfural (HMF) zu der für die Polymerindustrie interessanten Plattformchemikalie 2,5‐Furandicarbonsäure (FDCA) gewinnt immer mehr Aufmerksamkeit. FDCA‐basierter Polymere, wie z. B. Polyethylenfuranoat (PEF), besitzen das Potential, großtechnisch verwendete und auf Erdöl basierende Polymere Polyethylenterephthalat (PET) nachhaltig ersetzen. Wir berichten über hocheffiziente elektrokatalytische von HMF FDCA an...

Abstract The selectivity of the chlorine evolution reaction over oxygen during electrolysis aqueous NaCl is, despite being very high, still insufficient to prevent expensive separation formed Cl 2 and O by means liquefaction. We hypothesize that, decreasing local activity H near anode surface substantially increasing ionic strength electrolyte, would be suppressed, leading concomitantly a higher formation. Hence, influence on competition between electrochemical at dimensionally stable anodes...

Electrochemical efficiency and stability are among the most important characteristics of electrocatalysts. These parameters usually evaluated separately for anodic cathodic half-cell reactions in a three-electrode system or by measuring overall cell voltage between anode cathode as function current time. Here, we demonstrate how bipolar electrochemistry can be exploited to evaluate electrocatalysts full electrochemical water splitting while simultaneously independently monitoring individual...

NiyP emerged as a highly active precatalyst for the alkaline oxygen evolution reaction where structural changes play crucial role its catalytic performance. We probed chemical stability of in 1 M KOH at 80 °C and examined how exposure up to 168 h affects structure observed selective P-leaching formation NiyP/NiOx core–shell heterostructures, shell thickness increases with ageing time, which is detrimental activity. By tuning particle size, we demonstrate that prevention complete catalyst...

Engineering stable electrodes using highly active catalyst nanopowders for electrochemical water splitting remains a challenge. We report an innovative and general approach attaining films with self-healing capability based on the in situ self-assembly of particles during electrolysis. The are added to electrolyte forming suspension that is pumped through electrolyzer. Particles negatively charged surfaces stick onto anode, while positively cathode. self-assembled have properties as long...

Abstract Carbon is a frequently used electrode material and an important additive in catalyst films. Its corrosion often reported during electrocatalysis at high anodic potentials, especially acidic electrolyte. Investigation of the carbon alkaline environment difficult due to CO 2 /CO 3 2− equilibrium. We report on‐line determination electrolysis products generated on Ni x B/C hybrid electrocatalysts electrolyte potentials using differential electrochemical mass spectrometry (DEMS). films...

Abstract In addition to catalytic activity, intrinsic stability, tight immobilization on a suitable electrode surface, and sufficient electronic conductivity are fundamental prerequisites for the long‐term operation of particle‐ especially powder‐based electrocatalysts. We present novel approach concurrently address these challenges by using unique properties polybenzoxazine (pBO) polymers, namely near‐zero shrinkage high residual‐char yield even after pyrolysis at temperatures. Pyrolysis...

Abstract Hochaktive Katalysatoren für die Sauerstoffevolutionsreaktion (OER) sind in den meisten Fällen Nanomaterialen. Diese erfahren substantielle Veränderungen, hervorgerufen durch notwendigen anodischen Potentiale und hohen Stromdichten während der Sauerstoffevolution. Die Lebensdauer katalysatormodifizierter Elektroden ist unter OER‐Bedingungen aufgrund immensen Gasentwicklung fehlender Strategien zur stabilen Pulverfixierung auf Elektrodenoberflächen enttäuschend kurz. Aussagekräftige...

Abstract Earth‐abundant transition‐metal‐based catalysts are attractive for alkaline water electrolysis. However, their catalytic properties often limited by poor electrical conductivity. Here, we present a strategy enhancing the conductivity of NiFe layered double hydroxide (LDH) in order to further improve its as an electrocatalyst oxygen evolution reaction (OER) media. We show that LDH containing metal tetrasulfonate phthalocyanine interlayers between oxide galleries can be coupled with...

The authors report on the fabrication of a thermoresponsive biosensor for amperometric detection glucose. Screen printed electrodes with heatable gold working were modified by statistical copolymer [polymer I: poly(ω-ethoxytriethylenglycol methacrylate-co-3-(N,N-dimethyl-N-2-methacryloyloxyethyl ammonio) propanesulfonate-co-ω-butoxydiethylenglycol methacrylate-co-2-(4-benzoyl-phenoxy)ethyl methacrylate)] lower critical solution temperature around 28 °C in aqueous via electrochemically...

Mössbauerite is investigated for the first time as an "iron-only" mineral electrocatalytic oxygen evolution reaction in alkaline media. The synthesis proceeds via intermediate mixed-valence green rust that rapidly oxidized situ while conserving layered double hydroxide structure. material catalyzes on a glassy carbon electrode with current density of 10 mA cm-2 at 1.63 V versus reversible hydrogen electrode. Stability measurements, well post-electrolysis characterization are presented. This...