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Phosphorus‐Doped CuCo2O4 Oxide with Partial Amorphous Phase as a Robust Electrocatalyst for the Oxygen Evolution Reaction
ChemElectroChem ( IF 3.5 ) Pub Date : 2020-11-27 , DOI: 10.1002/celc.202001312 Zhen Guo 1, 2 , Yongyu Pang 2 , Huan Xie 2 , Guanjie He 3, 4 , Ivan P. Parkin 3 , Guo‐Liang Chai 2, 5
ChemElectroChem ( IF 3.5 ) Pub Date : 2020-11-27 , DOI: 10.1002/celc.202001312 Zhen Guo 1, 2 , Yongyu Pang 2 , Huan Xie 2 , Guanjie He 3, 4 , Ivan P. Parkin 3 , Guo‐Liang Chai 2, 5
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It is highly desirable to develop efficient and low‐cost electrocatalysts for the oxygen evolution reaction (OER) to improve the efficiency of water electrolysis. Here, we report a strategy doping with a small amount of phosphorus to make inactive and low‐cost spinel CuCo2O4 (CCO) turn into high‐efficiency and superior to the noble metal catalyst RuO2. The spinel CuCo2O4−P0.5 (CCP0.5) shows the best OER performance with a small overpotential of 290 mV at a current density of 10 mA cm−2 and a low Tafel slope of 68 mV dec−1 in an alkaline electrolyte. The phosphorus doping induces the production of an amorphous phase that provides a large number of active sites, and the synergistic effect of the crystalline phase and amorphous phase significantly improves the OER activity of CCO. It is also revealed that the conductivity of CCO is improved compared with pristine CCO. Our work highlights that non‐metallic element doping is an effective strategy to greatly enhance the OER performance of spinel transition metal oxide electrocatalysts.
中文翻译：
磷掺杂的具有部分非晶相的CuCo2O4氧化物是用于氧释放反应的鲁棒电催化剂
迫切需要开发一种高效，低成本的氧释放反应（OER）电催化剂，以提高水电解效率。在这里，我们报告了一种掺杂少量磷的策略，该策略使惰性且低成本的尖晶石CuCo 2 O 4（CCO）变得高效且优于贵金属催化剂RuO 2。尖晶石CuCo 2 O 4 -P 0.5（CCP 0.5）显示出最佳OER性能，在10 mA cm -2的电流密度下具有290 mV的小过电位和68 mV dec -1的低Tafel斜率在碱性电解液中。磷掺杂诱导产生提供大量活性位点的非晶相，并且结晶相和非晶相的协同作用显着提高了CCO的OER活性。还揭示了与原始CCO相比，CCO的电导率提高了。我们的工作表明，非金属元素掺杂是一种有效提高尖晶石过渡金属氧化物电催化剂OER性能的有效策略。
更新日期：2021-01-04
中文翻译：
磷掺杂的具有部分非晶相的CuCo2O4氧化物是用于氧释放反应的鲁棒电催化剂
迫切需要开发一种高效，低成本的氧释放反应（OER）电催化剂，以提高水电解效率。在这里，我们报告了一种掺杂少量磷的策略，该策略使惰性且低成本的尖晶石CuCo 2 O 4（CCO）变得高效且优于贵金属催化剂RuO 2。尖晶石CuCo 2 O 4 -P 0.5（CCP 0.5）显示出最佳OER性能，在10 mA cm -2的电流密度下具有290 mV的小过电位和68 mV dec -1的低Tafel斜率在碱性电解液中。磷掺杂诱导产生提供大量活性位点的非晶相，并且结晶相和非晶相的协同作用显着提高了CCO的OER活性。还揭示了与原始CCO相比，CCO的电导率提高了。我们的工作表明，非金属元素掺杂是一种有效提高尖晶石过渡金属氧化物电催化剂OER性能的有效策略。
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