Concomitant Rich Cobalt and Nickel Dual Active Sites in Janus Tubular Co3O4/NiCu Heterostructure for Ambient Hydrazine-Assisted Hydrogen Production Up to 3.0 A cm-2

Concomitant Rich Cobalt and Nickel Dual Active Sites in Janus Tubular Co3O4/NiCu Heterostructure for Ambient Hydrazine-Assisted Hydrogen Production Up to 3.0 A cm-2 | Authorea try { document.documentElement.classList.add('js'); } catch (e) { } var _gaq = _gaq || []; _gaq.push(['_setAccount', 'G-8VDV14Y67G']); _gaq.push(['_trackPageview']); (function() { var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true; ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js'; var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s); })(); Skip to main content Preprints Collections Wiley Open Research IET Open Research Ecological Society of Japan All Collections About About Authorea FAQs Contact Us Quick Search anywhere Search for preprint articles, keywords, etc. Search Search ADVANCED SEARCH SCROLL This is a preprint and has not been peer reviewed. Data may be preliminary. 21 September 2025 V1 Latest version Share on Concomitant Rich Cobalt and Nickel Dual Active Sites in Janus Tubular Co3O4/NiCu Heterostructure for Ambient Hydrazine-Assisted Hydrogen Production Up to 3.0 A cm-2 Authors : Qiangqiang Sun 0000-0002-8536-4414 [email protected] , Meina Jiang , Jia Xie , Yuhang Wei , Yihao Hou , Baoyue Cao , Ning Nan , Chun Li , Zhao Li , and Yibing Li Authors Info & Affiliations https://doi.org/10.22541/au.175842400.01272718/v1 130 views 79 downloads Contents Abstract Supplementary Material Information & Authors Metrics & Citations View Options References Figures Tables Media Share Abstract Hydrazine oxidation assisted energy-efficiency hydrogen production offers a promising rationale for sustainable clean energy conversion technologies, yet developing unique-structured electrocatalysts towards ampere-scale hydrazine oxidation reaction (HzOR) and hydrogen evolution reaction (HER) is still a grand challenge. Herein, we constructed highly arranged Janus tubular Co3O4/NiCu heterostructure via a rationally designed voltametric-assisted alloying-selective dealloying process (denoted as Co3O4/NiCu/NF) for the massive exposure of cobalt and nickel dual active sites with distinct heterostructures. Serving as bifunctional catalyst, it endows the Co3O4/NiCu/NF electrode extraordinary industrial-scale current densities of 1.0 and 3.0 A cm-2 at ultralow overpotentials of 265 and 433 mV for HzOR and 171 and 263 mV for HER, respectively. In the assembled electrolyzer towards overall hydrazine splitting (OHzS) cell, the Co3O4/NiCu/NF couple delivers exceptionally low voltages of 0.955 and 1.65 V at 1.0 and 2.0 A cm-2, respectively, maintaining stable operation with minimal degradation. Mechanism investigations reveal that the Co sites at Co3O4/NiCu heterointerface enact the active center for HER, whilst Ni sites for HzOR, for elevating the hydrogen adsorption and hydrazine dehydrogenation kinetics. The superior catalytic activity and robust electrocatalysis ensure its great potential in industrial application. Supplementary Material File (janus tubular co3o4-nicu manuscript.doc) Download 14.89 MB Information & Authors Information Version history V1 Version 1 21 September 2025 Copyright This work is licensed under a Non Exclusive No Reuse License. Keywords dual active sites electrochemical deposition hydrazine-assistance electrolysis industrial-scale performance janus tubular heterostructure Authors Affiliations Qiangqiang Sun 0000-0002-8536-4414 [email protected] Shangluo University View all articles by this author Meina Jiang Shangluo University View all articles by this author Jia Xie PetroChina Southwest Oil and Gasfield Company View all articles by this author Yuhang Wei Shangluo University View all articles by this author Yihao Hou Shangluo University View all articles by this author Baoyue Cao Shangluo University View all articles by this author Ning Nan Shangluo University View all articles by this author Chun Li Shangluo University View all articles by this author Zhao Li Xi’an Aeronautical University View all articles by this author Yibing Li Southwest Jiaotong University View all articles by this author Metrics & Citations Metrics Article Usage 130 views 79 downloads .FvxKWukQNSOunydq8rnd { width: 100px; } Citations Download citation Qiangqiang Sun, Meina Jiang, Jia Xie, et al. Concomitant Rich Cobalt and Nickel Dual Active Sites in Janus Tubular Co3O4/NiCu Heterostructure for Ambient Hydrazine-Assisted Hydrogen Production Up to 3.0 A cm-2. Authorea . 21 September 2025. DOI: https://doi.org/10.22541/au.175842400.01272718/v1 If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download. For more information or tips please see 'Downloading to a citation manager' in the Help menu . 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