21:I[432972,["/_next/static/chunks/bb923814e1f4d2e9.js","/_next/static/chunks/dd3ee9f5b7716ca6.js","/_next/static/chunks/4204a0ae82542ca8.js","/_next/static/chunks/30036bedc5269936.js","/_next/static/chunks/6e1aa89a642f40be.js","/_next/static/chunks/cd5e572bc3e4eb92.js","/_next/static/chunks/8ffd0b71567920d8.js","/_next/static/chunks/67ea6dfd21f16c5f.js","/_next/static/chunks/24eb4379f68013fd.js","/_next/static/chunks/b8cd775ffdf935bd.js","/_next/static/chunks/983103cd9eb7b428.js","/_next/static/chunks/d4ac9dcf27f6ff52.js","/_next/static/chunks/294b9525248c8e5f.js"],"default"] 22:T432,Electrochemical nitrate reduction reaction (NO3–RR) offers an alternative pathway toward ambient ammonia production and nitrogen balance restoration, requiring efficient catalysts. In this study, a silver-decorated cobalt oxide (Ag–Co3O4) catalyst was shown to enhance ammonia production during NO3–RR in an alkaline electrolyte. Specifically, the Ag–Co3O4 catalyst delivers an ammonia (NH3) yield rate of 52 μmol h–1 cm–2 with a Faradaic efficiency of 88% at −0.32 V versus RHE. The activity is 6 times higher than that of the conventional Co3O4 catalyst (8.8 μmol h–1 cm–2). The catalytic activity and selectivity of Ag–Co3O4 originate from the interaction between atomically dispersed Ag and Co3O4, resulting in the formation of active octahedral Co2+ species (Co2+Oh) with an unpaired eg electron, which facilitates the activation and adsorption of NO3– ion and promotes the *NO2 adsorption, along with its transformation to *NO intermediate. This leads to efficient NH4+ production, as evidenced by combined experimental and theoretical studies.23:T4cc,The photovoltaic-alkaline water (PV-AW) electrolysis system offers an appealing approach for large-scale green hydrogen generation. However, current PV-AW systems suffer from low solar-to-hydrogen (STH) conversion efficiencies (e.g., <20%) at practical current densities (e.g., >100 mA cm^-2), rendering the produced H₂ not economical. Here, we designed and developed a highly efficient PV-AW system that mainly consists of a customized, state-of-the-art AW electrolyzer and concentrator photovoltaic (CPV) receiver. The highly efficient anodic oxygen evolving catalyst, consisting of an iron oxide/nickel (oxy)hydroxide (Fe₂O₃-NiO_xH_y) composite, enables the customized AW electrolyzer with unprecedented catalytic performance (e.g., 1 A cm^-2 at 1.8 V and 0.37 kgH₂/m^-2 hour^-1 at 48 kWh/kgH₂). Benefiting from the superior water electrolysis performance, the integrated CPV-AW electrolyzer system reaches a very high STH efficiency of up to 29.1% (refer to 30.3% if the lead resistance losses are excluded) at large current densities, surpassing all previously reported PV-electrolysis systems.

#	Concept	H-Index	Publications	Citations
1	Engineering	1	1	50
2	Chemical Engineering	1	1	50
3	Chemistry	1	1	50
4	Materials Science	1	1	50
5	Catalysis	1	1	50

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