磷化镍铁沉积碳毡作为用于尿素电解的独立双功能催化剂电极。
Ni-Fe phosphide deposited carbon felt as free-standing bifunctional catalyst electrode for urea electrolysis.
作者信息
Yun Woo Hyun, Das Gautam, Kim Bohyeon, Park Bang Ju, Yoon Hyon Hee, Yoon Young Soo
机构信息
Department of Chemical and Biological Engineering, Gachon University, Seongnam, Gyeonggi-do, 461-701, Republic of Korea.
Department of Polymer Science and Engineering, Kyungpook National University, Sangyeok-dong, Buk-gu, Daegu, Korea.
出版信息
Sci Rep. 2021 Nov 9;11(1):22003. doi: 10.1038/s41598-021-01383-3.
A free-standing catalyst electrode for the urea oxidation reaction (UOR) and hydrogen evolution reaction (HER) in a urea electrolysis cell was synthesized by electroplating a Ni-Fe alloy onto carbon felt, followed by phosphidation (P-NiFe@CF). The prepared P-NiFe@CF catalyst consisted of NiP, NiP, and FeP with 3D flower-like P-NiFe architecture on CF. P-NiFe@CF exhibited excellent electrocatalytic activity for the UOR (demanding only 1.39 V (vs. RHE) to achieve 200 mA cm), and for the HER with a low overpotential of 0.023 V (vs. RHE) at 10 mA cm, indicating its feasibility as a bifunctional catalyst electrode for urea electrolysis. A urea electrolysis cell with P-NiFe@CF as both the free-standing anode and cathode generated a current density of 10 mA cm at a cell potential of 1.37 V (vs. RHE), which is considerably lower than that of water electrolysis, and also lower than previously reported values. The results indicate that the P-NiFe@CF catalyst electrodes can be used as free-standing bifunctional electrodes for urea electrolyzers.
通过在碳毡上电沉积镍铁合金，然后进行磷化处理（P-NiFe@CF），合成了一种用于尿素电解槽中尿素氧化反应（UOR）和析氢反应（HER）的独立式催化剂电极。制备的P-NiFe@CF催化剂由NiP、NiP和FeP组成，在CF上具有三维花状P-NiFe结构。P-NiFe@CF对UOR表现出优异的电催化活性（仅需1.39 V（相对于RHE）即可达到200 mA cm），对HER在10 mA cm时具有0.023 V（相对于RHE）的低过电位，表明其作为尿素电解双功能催化剂电极的可行性。以P-NiFe@CF作为独立阳极和阴极的尿素电解槽在1.37 V（相对于RHE）的电池电位下产生了10 mA cm的电流密度，这远低于水电解的电流密度，也低于先前报道的值。结果表明，P-NiFe@CF催化剂电极可作为尿素电解槽的独立双功能电极。
Zotero 插件