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Hierarchically Structured CuCo2S4 Nanowire Arrays as Efficient Bifunctional Electrocatalyst for Overall Water Splitting
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2018-07-16 00:00:00 , DOI: 10.1021/acssuschemeng.8b02155 Steffen Czioska 1 , Jianying Wang 1 , Xue Teng 1 , Zuofeng Chen 1
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2018-07-16 00:00:00 , DOI: 10.1021/acssuschemeng.8b02155 Steffen Czioska 1 , Jianying Wang 1 , Xue Teng 1 , Zuofeng Chen 1
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Hydrogen produced from water splitting offers a green alternative to conventional energy such as fossil fuels. Herein, CuCo2S4 nanowire arrays were synthesized on a nickel foam substrate by a two-step hydrothermal approach and utilized as highly efficient bifunctional electrocatalyst for overall water splitting. The CuCo2S4 nanowire arrays were identified as an exceptionally active catalyst for the hydrogen evolution reaction (HER) in a basic solution with an extremely low overpotential of 65 mV to reach a current density of 10 mA/cm2. The hierarchically structured CuCo2S4 electrode was also highly active toward the oxygen evolution reaction (OER), achieving a high current density of 100 mA/cm2 at an overpotential of only 310 mV. Consequently, an alkaline electrolyzer constructed using CuCo2S4 nanowire arrays as both anode and cathode can realize overall water splitting with a current density of 100 mA/cm2 at a cell voltage of 1.65 V, suggesting a promising bifunctional electrocatalyst for efficient overall water splitting.
中文翻译：
分层结构的CuCo 2 S 4纳米线阵列作为用于整体水分解的高效双功能电催化剂
水分解产生的氢气为传统能源（例如化石燃料）提供了绿色替代品。在此，通过两步水热法在泡沫镍基板上合成了CuCo 2 S 4纳米线阵列，并将其用作高效的双功能电催化剂，用于总水分解。在碱性溶液中，CuCo 2 S 4纳米线阵列被认为是氢释放反应（HER）的极活泼催化剂，具有65 mV的极低超电势，可达到10 mA / cm 2的电流密度。分层结构的CuCo 2 S 4电极对氧气释放反应（OER）也具有很高的活性，在仅310 mV的过电势下实现了100 mA / cm 2的高电流密度。因此，使用CuCo 2 S 4纳米线阵列作为阳极和阴极的碱性电解槽可以在1.65 V的电池电压下以100 mA / cm 2的电流密度实现总水分解，这表明有希望的双功能电催化剂可以有效地净化总水分裂。
更新日期：2018-07-16
中文翻译：
分层结构的CuCo 2 S 4纳米线阵列作为用于整体水分解的高效双功能电催化剂
水分解产生的氢气为传统能源（例如化石燃料）提供了绿色替代品。在此，通过两步水热法在泡沫镍基板上合成了CuCo 2 S 4纳米线阵列，并将其用作高效的双功能电催化剂，用于总水分解。在碱性溶液中，CuCo 2 S 4纳米线阵列被认为是氢释放反应（HER）的极活泼催化剂，具有65 mV的极低超电势，可达到10 mA / cm 2的电流密度。分层结构的CuCo 2 S 4电极对氧气释放反应（OER）也具有很高的活性，在仅310 mV的过电势下实现了100 mA / cm 2的高电流密度。因此，使用CuCo 2 S 4纳米线阵列作为阳极和阴极的碱性电解槽可以在1.65 V的电池电压下以100 mA / cm 2的电流密度实现总水分解，这表明有希望的双功能电催化剂可以有效地净化总水分裂。
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