NiCo₂O₄ is <italic>in situ</italic> assembled on g-C₃N₄ and works as a novel oxygen-evolution-reaction cocatalyst to promote photocatalytic O₂-evolution reaction, then Pt–NiCo₂O₄ dual loaded achieves overall water splitting.

Japan has committed to carbon neutrality by 2050. Emissions from the electricity sector amount 42% of total. Solar photovoltaics (PV) and wind comprise three quarters global net capacity additions because low falling prices. This provides an opportunity for make large reductions in emissions while also reducing its dependence on energy imports. study shows that 14 times more solar offshore resources than needed supply 100% renewable electricity. A 40 year hourly balance model is presented...

The structure tuning of bulk graphitic carbon nitride (g-C3N4) is a critical way to promote the charge carriers dynamics for enhancing photocatalytic H2-evolution activity. Exploring feasible post-treatment strategies can lead effective tuning, but it still remains great challenge. Herein, supercritical CH3OH (ScMeOH) strategy (250–300 °C, 8.1–11.8 MPa) developed g-C3N4. This presented advantages time-saving (less than 10 min), high yield (over 80%), and scalability due enhanced mass...

• Examines using offshore wind power for hydrogen production with low-cost solar photovoltaic renewable generation. Model optimizes generation, storage and electrolyser capacities to find the least-cost solution in Australia. Offshore has a potentially useful role play supporting production, but taking advantage of this opportunity requires careful site selection. Future prices need fall cost around AUD2/kg, equivalent Australian federal government target.

Hydrogen evolution reaction (HER) in neutral or alkaline electrolytes is appealing for sustainable hydrogen production driven by water splitting, but generally suffers from unsatisfied catalytic activities at high current densities owing to extra kinetic energy barriers required generate protons through dissociation. In response, here, a competitive Ni

Solar photovoltaics (PVs) and wind constitute more than 60% of global annual net new capacity additions. Balancing an electricity system with 30-100% variable PV is straightforward using off-the-shelf techniques comprising stronger interconnection over large areas to smooth out local weather, storage, demand management, occasional spillage renewable electricity. The overwhelming dominance PV, wind, hydroelectricity in energy deployment means that tracking toward near equivalence energy. A...

In this paper, we conclude that Indonesia has vast potential for generating and balancing solar photovoltaic (PV) energy to meet future needs at a competitive cost. We systematically analyse renewable in Indonesia. Solar PV is identified be an source whose technical, environmental economic far exceeds Indonesia’s present requirements larger than all other resources combined. estimate electricity consumption could reach 9000 terawatt-hours per year by 2050, which 30 times present. abundant...

Australia has one of the highest per capita consumption energy and emissions greenhouse gases in world. It is also global leader rapid annual deployment new solar wind energy, which causing country's to decline. located at low-moderate latitudes along with three quarters world's population. These factors make Australian experience globally significant. In this study, a fully decarbonised electricity system modelled together complete electrification heating, transport industry leading an 80%...

A series of WO3/g-C3N4 composites with different WO3 contents were prepared via a facile one-pot pyrolysis method, and showed notably enhanced visible-light-driven photocatalytic H2-evolution activities, the highest rate 400 μmol h-1 gcat-1 that was 15.0 times for pristine g-C3N4. Contents sizes crystallites in easily adjusted by changing molar ratios (NH4)2WS4 to C3H6N6 feed reagents, thereby successfully optimizing Z-scheme system constructed g-C3N4 thus effectively reducing recombination...

Large amounts of energy storage are required to support high levels solar and wind power. Pumped hydro comprises the majority global for electricity industry. A previous study identified 616,000 potential "Greenfield" closed-loop (off-river) pumped sites around world with combined 23,000 Terawatt-hours (TWh). In this study, we identify 904 in mining areas ("Brownfield") 30 TWh. spatial resolution atlas Brownfield systems is available online. It was developed through Geographic Information...

Abstract Developing high‐efficiency yet low‐cost photocatalyst for solar hydrogen production by avoiding the use of noble metals has received adequate interest but remains a great challenge to date. This work reports seed‐mediated hydrothermal approach synthesis NiS 2 quantum dots (QDs) anchored two‐dimensional graphitic carbon nitride (g‐C 3 N 4 ) nanosheets. hybrid shows superior performance toward photocatalytic H evolution from water. The highest rate reaches 4.841 μmol h −1 , with an...

Rapid cost reductions have led to the widespread deployment of renewable technologies such as solar photovoltaics (PV) and wind globally. Additional storage is needed when share PV in electricity production rises 50-100%. Pumped hydro energy constitutes 97% global capacity stored power over 99% leading method storage. Off-river pumped options, strong interconnections large areas, demand management can support a highly system at modest cost. East Asia has abundant wind, solar, off-river...

Large greenhouse gas reductions are possible with a fully decarbonised grid and electric land transport. Additional load could pose significant challenge to high levels of variable non-dispatchable renewable energy sources. This scenario is not well-examined, nor the use pumped hydro storage for low-cost balancing. In this paper, we investigate electrification transport within photovoltaics wind dominated 100% electricity system. Only technologies that deployed at scale widely available...

Rapid cost reductions of solar photovoltaics and wind offer a pathway to deep decarbonization energy at low cost. Off-river pumped hydro storage provides mature, cheap very large-scale that helps balance variable generation demand while avoiding environmental social impacts. Many developing countries, especially those in the sunbelt, have opportunity adopt this bypass additional fossil fuel capacities their economies. This study investigates feasibility such for Bolivia, country relies...