Copper–Nickel Nitride Nanosheets as Efficient Bifunctional Catalysts for Hydrazine‐Assisted Electrolytic Hydrogen Production. Issue 21 (10th April 2019)

• Record Type: Journal Article
• Authors: Wang, Zhaoyang; Xu, Lin; Huang, Fuzhi; Qu, Longbing; Li, Jiantao; Owusu, Kwadwo Asare; Liu, Ziang; Lin, Zifeng; Xiang, Binhua; Liu, Xiong; Zhao, Kangning; Liao, Xiaobin; Yang, Wei; Cheng, Yi‐Bing; Mai, Liqiang
• Is Part Of: Advanced energy materials. Volume 9:Issue 21(2019)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2019-04-10
• Subjects: bifunctional catalysts -- copper–nickel nitride -- hydrazine oxidation -- hydrogen evolution -- water electrolysis; Energy harvesting -- Materials -- Periodicals; Energy conversion -- Materials -- Periodicals; Energy storage -- Materials -- Periodicals; Photovoltaics -- Periodicals; Fuel cells -- Periodicals; Thermoelectric materials -- Periodicals; 621.31
• DOI: 10.1002/aenm.201900390
• Languages: English
• ISSNs: 1614-6832

Abstract

Abstract: Electrocatalytic water splitting is one of the sustainable and promising strategies to generate hydrogen fuel but still remains a great challenge because of the sluggish anodic oxygen evolution reaction (OER). A very effective approach to dramatically decrease the input cell voltage of water electrolysis is to replace the anodic OER with hydrazine oxidation reaction (HzOR) due to its lower thermodynamic oxidation potential. Therefore, developing the low‐cost and efficient HzOR catalysts, coupled with the cathodic hydrogen evolution reaction (HER), is tremendously important for energy‐saving electrolytic hydrogen production. Herein, a new‐type of copper–nickel nitride (Cu1 Ni2 ‐N) with rich Cu4 N/Ni3 N interface is rationally constructed on carbon fiber cloth. The 3D electrode exhibits extraordinary HER performance with an overpotential of 71.4 mV at 10 mA cm −2 in 1.0m KOH, simultaneously delivering an ultralow potential of 0.5 mV at 10 mA cm −2 for HzOR in a 1.0m KOH/0.5m hydrazine electrolyte. Moreover, the electrolytic cell utilizing the synthesized Cu1 Ni2 ‐N electrode as both the cathode and anode display a cell voltage of 0.24 V at 10 mA cm −2 with an excellent stability over 75 h. The present work develops the promising copper–nickel‐based nitride as a bifunctional electrocatalyst through hydrazine‐assistance for energy‐saving electrolytic hydrogen production. Abstract : A new type of copper–nickel nitride porous nanosheet with a rich Cu4 N/Ni3 N interface supported on carbon fiber cloth is synthesized for the first time. The bifunctional catalyst electrode exhibits both outstanding performance for hydrogen evolution reaction and hydrazine oxidation reaction, making it a promising candidate for energy saving electrolytic hydrogen production.