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Trace Level Co–N Doped Graphite Foams as High-Performance Self-Standing Electrocatalytic Electrodes for Hydrogen and Oxygen Evolution
ACS Catalysis ( IF 11.3 ) Pub Date : 2018-04-17 00:00:00 , DOI: 10.1021/acscatal.8b01131 Yue Tong 1 , Xiaowen Yu 1 , Haiyan Wang 1 , Bowen Yao 1 , Chun Li 1 , Gaoquan Shi 1
ACS Catalysis ( IF 11.3 ) Pub Date : 2018-04-17 00:00:00 , DOI: 10.1021/acscatal.8b01131 Yue Tong 1 , Xiaowen Yu 1 , Haiyan Wang 1 , Bowen Yao 1 , Chun Li 1 , Gaoquan Shi 1
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The development of eco-friendly electrocatalysts with high performance and low cost for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) is significant for renewable energy storage. Here, trace level (0.11–0.18 wt %) Co–N doped graphite foam (Co–N/GF) was reported to work as a bifunctional high-performance and self-standing electrode for both HER and OER in alkaline electrolyte. The catalytic activities of Co–N/GFs with different annealing temperatures (600, 700, 800, 900, and 1000 °C) were carefully studied. Among them, Co–N/GF-900 exhibited the best HER activity and Co–N/GF-700 showed the best OER activity, achieving the current density of 10 mA cm–2 at low overpotentials of 165 and 313 mV, respectively. In addition, both of these electrodes exhibited long-term durability. Co–N/GF electrodes were further constructed as a catalytic cathode and anode couple (Co–N/GF-900∥Co–N/GF-700) for overall water splitting, exhibiting a low cell voltage of 1.68 V and good long-term stability. Our work reveals that introducing a trace level of Co–N into graphite foam can significantly enhance its electrocatalytic activity and stability for both HER and OER.
中文翻译：
痕量Co-N掺杂石墨泡沫作为高性能自立式电催化电极，用于产生氢气和氧气
氢气释放反应（HER）和氧气释放反应（OER）高性能，低成本的环保型电催化剂的开发对于可再生能源的存储具有重要意义。在此，据报道，痕量（0.11-0.18 wt％）的掺有Co-N的石墨泡沫（Co-N / GF）可作为碱性电解质中HER和OER的双功能高性能自立电极。仔细研究了不同退火温度（600、700、800、900和1000°C）下的Co-N / GFs的催化活性。其中，Co–N / GF-900表现出最好的HER活性，Co–N / GF-700表现出最好的OER活性，达到10 mA cm –2的电流密度在低过电势分别为165和313 mV的情况下。另外，这两个电极均显示出长期耐久性。Co-N / GF电极还被构造为催化阴极和阳极对（Co-N /GF-900∥Co-N/ GF-700），用于整体水分解，具有1.68 V的低电池电压和良好的长寿命。长期稳定性。我们的工作表明，在石墨泡沫中引入痕量的Co-N可以显着增强其对HER和OER的电催化活性和稳定性。
更新日期：2018-04-17
中文翻译：
痕量Co-N掺杂石墨泡沫作为高性能自立式电催化电极，用于产生氢气和氧气
氢气释放反应（HER）和氧气释放反应（OER）高性能，低成本的环保型电催化剂的开发对于可再生能源的存储具有重要意义。在此，据报道，痕量（0.11-0.18 wt％）的掺有Co-N的石墨泡沫（Co-N / GF）可作为碱性电解质中HER和OER的双功能高性能自立电极。仔细研究了不同退火温度（600、700、800、900和1000°C）下的Co-N / GFs的催化活性。其中，Co–N / GF-900表现出最好的HER活性，Co–N / GF-700表现出最好的OER活性，达到10 mA cm –2的电流密度在低过电势分别为165和313 mV的情况下。另外，这两个电极均显示出长期耐久性。Co-N / GF电极还被构造为催化阴极和阳极对（Co-N /GF-900∥Co-N/ GF-700），用于整体水分解，具有1.68 V的低电池电压和良好的长寿命。长期稳定性。我们的工作表明，在石墨泡沫中引入痕量的Co-N可以显着增强其对HER和OER的电催化活性和稳定性。
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