Affected by both the energy shortage and environmental crisis, the development of electrocatalytic conversion process powered by renewable energy (wind, solar, tide, etc.) has received considerable attention. [1][2][3][4][5] Generally, electrocatalytic reactions involve To make efficient use of electrical energy in the whole electrocatalysis conversion process, the integrating of anode and cathode reactions plays a vital role. The combination of electrocatalytic anodic oxidation with cathodic reduction can not only maximize the return of energy investment, but also produces value-added materials on both sides. Herein, in this review, recent advances in co-electrolysis processes for valuable chemical production are systematically summarized. To be more specific, the popular hydrogen evolution reaction, carbon dioxide reduction reaction, nitrogen reduction reaction as well as nitrate reduction reaction integrated with anodic oxidation reactions to valueadded products, respectively are comprehensively reviewed, and then other paired electrolysis systems (especially for biomass-based compounds) toward high-value-added chemical generation are discussed in detail. This review sheds light on the integration of electrocatalytic reductions and oxidation reactions to develop high-value substances. To benefit researchers and facilitate the progress in this field, the challenges and future prospects for these integrated reactions are also proposed.

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Ru species encapsulated in HCSs can effectively break the homogeneous electron distribution and generate abundant active sites for the HER.

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The development of clean fuels for hydrogen utilization will benefit from low-cost and active catalysts to produce hydrogen via hydrolytic dehydrogenation by electrochemical and chemical means. Herein, we designed and synthesized a high-efficiency and stable catalyst with lowruthenium content CoRu alloy nanoparticles supported on porous nitrogen-doped graphene layers (CoRu

Electrocatalytic seawater splitting has been considered as a transformative technology for industrial-scale hydrogen generation. However, the competition between oxygen evolution reaction (OER) and chlorine evolution reaction (CER) at the anode...

Developing high-efficiency and low-cost catalysts for the hydrogen evolution reaction (HER) and hydrogen generation from chemical hydrogen storage materials are both significant and critical for the exploitation and utilization of hydrogen energy. Herein, we reported a ruthenium−cobalt alloy (Ru, 1.8 wt %) enriched in hollow carbon spheres (denoted RuCo@HCSs) synthesized through a wet vacuum impregnation method followed by pyrolysis treatment. RuCo alloys are obtained by direct reduction of Ru and Co chloride precursors, avoiding hydrothermal and washing processes, and the Ru/Co ratio of the alloy can be precisely controlled. The RuCo@HCS catalyst not only displays outstanding HER performance with a low overpotential (η 10 ) and Tafel slope (21 mV and 32 mV dec −1 in 1.0 M KOH, 57 mV and 48 mV dec −1 in 0.5 M H 2 SO 4 , and 49 mV and 59 mV dec −1 in 1.0 M phosphate-buffered saline) within a wide pH range but also offers a high turnover frequency (TOF) value of 784 mol H2 min −1 mol cat −1 for the hydrolysis of ammonia borane under ambient conditions. The excellent catalytic performance of RuCo@HCSs is attributed to the special hollow embedded configuration and collaborative effect between carbon shells and RuCo alloys. Density functional theory calculations reveal that the excellent catalytic performance of RuCo@HCSs originates from the carbon shells activated by the electron transferred from the embedded metal nanoparticles. This work provides a convenient route for preparing highly active and inexpensive metal/carbon composite bifunctional catalysts.