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Ni3N-Coated Ni Nanorod Arrays for Hydrogen and Oxygen Evolution in Electrochemical Water Splitting
ACS Applied Nano Materials ( IF 5.3 ) Pub Date : 2020-10-27 , DOI: 10.1021/acsanm.0c02222 Hongmei Wang 1 , Jie Xiong 1 , Xing Cheng 2 , Mathias Fritz 3 , Adriana Ispas 4 , Andreas Bund 3 , Ge Chen 2 , Dong Wang 1 , Peter Schaaf 1
ACS Applied Nano Materials ( IF 5.3 ) Pub Date : 2020-10-27 , DOI: 10.1021/acsanm.0c02222 Hongmei Wang 1 , Jie Xiong 1 , Xing Cheng 2 , Mathias Fritz 3 , Adriana Ispas 4 , Andreas Bund 3 , Ge Chen 2 , Dong Wang 1 , Peter Schaaf 1
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Designing high efficiency non-noble metal catalysts for electrochemical hydrogen and oxygen evolution reactions (HER and OER) is a challenging and promising task. In the present work, a large-scale self-supported black nickel sheet composed of nickel nanorod arrays (B-Ni) was successfully fabricated via electroplating with a nanostructured Si template assisted strategy, and Ni3N coating layer was coated on the structured surface followed by a nitrogen plasma treatment with different treatment durations. The black color is due to the immensely enhanced light absorption through the surface nanostructures with high aspect ratio. The samples show promising catalytic performance when used as electrochemical catalysts for both HER and OER in alkaline electrolyte. Benefiting from the nanostructure and the Ni3N coating, B-Ni_N2_10 min exhibits low onset potentials of 1.560 and 0.165 V at a current density of 10 mA/cm2 for OER and HER, respectively. The calculated electrochemical surface area (ECSA) for B-Ni is 10 times higher than the pristine Ni sheet (P-Ni), while after nitrogen plasma treatment, the ECSA for B-Ni_N2_10 min is 21 times higher than that of the P-Ni. In addition, all the catalysts show good electrochemical stabilities. All the improvements for the electrochemical performances suggest that nanostructured nickel nitride could be a promising inexpensive catalyst system for both OER and HER processes.
中文翻译：
Ni 3 N包覆的Ni纳米棒阵列用于电化学水分解中的氢和氧释放
设计用于电化学氢和氧逸出反应（HER和OER）的高效非贵金属催化剂是一项充满挑战和前途的任务。在本工作中，采用纳米结构硅模板辅助策略通过电镀成功制备了由镍纳米棒阵列（B-Ni）组成的大规模自支撑黑镍片，并在结构化表面上涂覆了Ni 3 N涂层。然后进行氮等离子体处理，处理时间不同。黑色是由于通过具有高长宽比的表面纳米结构极大地增强了光吸收。当用作碱性电解质中HER和OER的电化学催化剂时，样品显示出令人鼓舞的催化性能。受益于纳米结构和镍对于OER和HER，B-Ni_N 2 _10 min的3 N涂层在10 mA / cm 2的电流密度下分别表现出1.560和0.165 V的低启动电位。计算得出的B-Ni电化学表面积（ECSA）是原始Ni片材（P-Ni）的10倍，而氮等离子体处理后，B-Ni_N 2 _10 min的ECSA是其原始Ni-N 2 _10 min的ECSA。镍 另外，所有催化剂都显示出良好的电化学稳定性。电化学性能的所有改进表明，纳米结构的氮化镍对于OER和HER工艺而言都是一种有前途的廉价催化剂体系。
更新日期：2020-11-25
中文翻译：
Ni 3 N包覆的Ni纳米棒阵列用于电化学水分解中的氢和氧释放
设计用于电化学氢和氧逸出反应（HER和OER）的高效非贵金属催化剂是一项充满挑战和前途的任务。在本工作中，采用纳米结构硅模板辅助策略通过电镀成功制备了由镍纳米棒阵列（B-Ni）组成的大规模自支撑黑镍片，并在结构化表面上涂覆了Ni 3 N涂层。然后进行氮等离子体处理，处理时间不同。黑色是由于通过具有高长宽比的表面纳米结构极大地增强了光吸收。当用作碱性电解质中HER和OER的电化学催化剂时，样品显示出令人鼓舞的催化性能。受益于纳米结构和镍对于OER和HER，B-Ni_N 2 _10 min的3 N涂层在10 mA / cm 2的电流密度下分别表现出1.560和0.165 V的低启动电位。计算得出的B-Ni电化学表面积（ECSA）是原始Ni片材（P-Ni）的10倍，而氮等离子体处理后，B-Ni_N 2 _10 min的ECSA是其原始Ni-N 2 _10 min的ECSA。镍 另外，所有催化剂都显示出良好的电化学稳定性。电化学性能的所有改进表明，纳米结构的氮化镍对于OER和HER工艺而言都是一种有前途的廉价催化剂体系。
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