Abstract Although single-atomically dispersed metal-N x on carbon support (M-NC) has great potential in heterogeneous catalysis, the scalable synthesis of such single-atom catalysts (SACs) with high-loading is greatly challenging since loading and single-atomic dispersion have to be balanced at high temperature for forming . Herein, we develop a general cascade anchoring strategy mass production series M-NC SACs metal up 12.1 wt%. Systematic investigation reveals that chelation ions,...

Phosphorus-modified tungsten nitride/reduced graphene oxide (P-WN/rGO) is designed as a high-efficient, low-cost electrocatalyst for the hydrogen evolution reaction (HER). WN (ca. 3 nm in size) on rGO first synthesized by using H3[PO4(W3O9)4] cluster W source. Followed phosphorization, particle size increase slightly to about 4 with P content of 2.52 at %. The interaction and results an obvious work function, being close Pt metal. P-WN/rGO exhibits low onset overpotential 46 mV, Tafel slope...

GeSe has recently emerged as a promising photovoltaic absorber material due to its attractive optical and electrical properties well earth-abundant low-toxic constituent elements. However, no device been reported based on this so far, which could be attributed the inevitable coexistence of phase impurities Ge GeSe2, leading detrimental recombination-center defects seriously degrading performance. Here we overcome issue by introducing simple fast (4.8 μm min-1) rapid thermal sublimation (RTS)...

Electrocatalytic N2 reduction to NH3 is an attractive method for artificial fixation at ambient conditions. Herein, we demonstrate that Fe-NC materials could be efficient electrochemical reaction (NRR) using iron phthalocyanine (FePc) with a well-defined FeN4 configuration as model catalyst. By uniformly loading FePc molecules on porous carbon, it exhibits high electrocatalytic activity NRR yield rate of 137.95 μg h–1 mg–1FePc low potential −0.3 V (vs RHE). Importantly, by making comparisons...

Alkaline hydrogen evolution reaction (HER), consisting of Volmer and Heyrovsky/Tafel steps, requires extra energy for water dissociation, leading to more sluggish kinetics than acidic HER. Despite the advances in electrocatalysts, how combine active sites synergistically promote both steps understand underlying mechanism remain largely unexplored. Here, Density Functional Theory (DFT) calculations predict that NiO accelerates step while metallic Ni facilitates step. A facile strategy is thus...

Nitrogen-doped carbon materials (N-Cmat ) are emerging as low-cost metal-free electrocatalysts for the electrochemical CO2 reduction reaction (CO2 RR), although activities still unsatisfactory and genuine active site is under debate. We demonstrate that RR to CO preferentially takes place on pyridinic N rather than pyrrolic using phthalocyanine (Pc) porphyrin with well-defined N-Cmat configurations molecular model catalysts. Systematic experiments theoretic calculations further reveal...

The advancement of UOR is hindered by sluggish kinetics. Hence, we overview mechanisms, nanocatalyst design strategies, and applications in energy conversion to reduce consumption broaden the research fields electrocatalysis.

Abstract Phosphorus‐modified tungsten nitride/reduced graphene oxide (P‐WN/rGO) is designed as a high‐efficient, low‐cost electrocatalyst for the hydrogen evolution reaction (HER). WN (ca. 3 nm in size) on rGO first synthesized by using H [PO 4 (W O 9 ) ] cluster W source. Followed phosphorization, particle size increase slightly to about with P content of 2.52 at %. The interaction and results an obvious work function, being close Pt metal. P‐WN/rGO exhibits low onset overpotential 46 mV,...

Abstract MoS 2 has emerged as a promising alternative electrocatalyst for the hydrogen evolution reaction (HER) due to high intrinsic per‐site activity on its edge sites and S‐vacancies. However, significant challenge is limited density of such sites. Reducing size layer number vertically aligning them would be an effective way enrich expose HER. Herein, facile self‐limited on‐site conversion strategy synthesizing monolayer in couple nanometers which are highly dispersed aligned 3D porous...

Fe2N nanoparticles and nitrogen-doped graphitic nanosheet composites (Fe2N-NGC) have been synthesized by an ion-exchanged route, which can serve as efficient non-precious metal electrocatalyst with a 4e(-) reaction pathway for oxygen reduction reactions (ORR).

A novel ferric-phosphate induced shape memory (SM) hydrogel is prepared by the one-step copolymerization of isopropenyl phosphonic acid (IPPA) and acrylamide (AM) in presence a crosslinker polyethylene glycol diacrylate (PEGDA). Different from traditional SM hydrogels, our can be processed into various shapes as needed recovers to its original form ‘multiconditions’ such reducing agent or competitive complexing agent. This unique feature attributed fact that oxidized ferric ions show high...

Abstract Electroless deposition via a spontaneous redox reaction between the metal precursor and support is believed to be promising approach for syntheses of supported nanoparticles (SMNPs). However, its widespread applications are significantly prohibited by low reductivity high cost support. To overcome these shortcomings, porous carbon (PC) herein developed as matrix electroless NPs. Benefiting from abundant oxygen‐based surface functional groups, PC shows stronger reducibility (low...

Sm2+-doped SrB4O7 was synthesized for high-sensitivity thermometry. A high thermal-sensitive fluorescence intensity ratio and lifetime were achieved in a wide temperature range. At 500 K, the relative sensitivity of sensing 2.16% K–1 3.36% lifetime. Furthermore, color-shifted dramatically from deep red at room to green 700 K. On basis this color change, visible field obtained on quartz glass covered with our sample, which made thermal conduction distribution human eye. The determined using...

Recently, much attention has been paid to Mn4+-doped phosphors due their strong deep-red emissions which are in demand white light-emitting diodes. However, a key challenge for the commercialization of is low thermal stability caused by quenching Mn4+ luminescence. Herein, strategy optical temperature sensing developed specifically utilizing explore potential applications sensing. In this work, we report two kinds double perovskite type phosphors, Ba2LaNbO6 (BLN) and Ca2LaNbO6 (CLN),...

Steady and efficient sensitized emission of Eu2+ to Eu3+ can be achieved through a rare mixed-valence Eu-MOF (L4EuIII2EuII). Compared with the sensitization other substances, similar ion radius configuration extranuclear electron between make easier more efficient. The is great assistance for self-enhanced luminescence L4EuIII2EuII, longer luminous time, stable electrochemiluminescence (ECL) signal. Simultaneously, L4EuIII2EuII possesses near-infrared (NIR) fluorescence around 900 nm mighty...

The controlled release strategy can make the constructed sensor have function of self-on/off, which has an obvious effect on improving sensitivity in immunoassays. Metal organic gels (MOGs) are most noteworthy. They materials with ultrahigh surface area, highly dispersed atomical metal sites, and well-defined porosity be used as efficient luminophore to cause developed good hydrophilicity adjustability, thus further detection sensitivity. In this work, a novel on/off electrochemiluminescence...

Abstract B,N-codoped carbon nanostructures (BNCS) can serve as alternative low-cost metal-free electrocatalysts for oxygen reduction reactions (ORR). However, the compensation effect between p- (B atoms) and n-type (N dopants would make covalent boron-nitride (BN) easily formed during synthesis of BNCS, leading to a unsatisfactory ORR activity. Therefore, it has been challenging develop facile rapid synthetic strategies highly active BNCS without forming direct BN. Here, method is developed...

Nitrogen (N)-doped carbons combined with transition-metal nanoparticles are attractive as alternatives to the state-of-the-art precious metal catalysts for hydrogen evolution reaction (HER). Herein, we demonstrate a strategy fabricating three-dimensional (3D) Cu-encased N-doped carbon nanotube arrays which directly grown on Cu foam (Cu@NC NT/CF) new efficient HER electrocatalyst. encased here instead of common transition metals (Fe, Co, or Ni) pursuing well-controllable morphology and an...

Here, we report an anodic replacement of the water oxidation reaction with more readily oxidizable species to facilitate ambient electrocatalytic nitrogen reduction (NRR). A self-supported catalyst, CuII-MOF on carbon cloth (JUC-1000/CC), acts as a versatile cathode and anode for both NRR electro-oxidation sodium gluconate glucaric acid. Impressively, two-electrode system requires potential only 0.4 V achieve NH3 yield rate 24.7 μg h-1 mgcat-1, FE 11.90% SA selectivity 96.96%, shows strong...