ZIF-67 derived Co, Fe, Ni co-doped porous carbon as an efficient electrocatalyst for hydrogen evolution reaction
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ZIF‑67 derived Co, Fe, Ni co‑doped porous carbon as an efficient electrocatalyst for hydrogen evolution reaction Liping Zhao1 · Ailin Yang1 · Anqi Wang1 · Hang Yu1 · Jun Dai2 · Youjin Zheng3
© Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstract Exploring electrocatalysts with abundant active sites, durability and non-precious performance for hydrogen evolution reaction (HER) is of significant importance for the energy crisis. In this paper, Co, Fe, Ni co-doped porous carbon (CoFeNi/ PC) was fabricated by using zeolitic imidazolate framework-67 (ZIF-67) as precursor via a facile absorption and pyrolysis process. Compared with Co/PC, CoFe/PC, and CoNi/PC, CoFeNi/PC exhibits excellent HER performance with a low overpotential of 289 mV at 10 mA cm−2 and s small Tafel slope of 65.8 mA d ec−1. Furthermore, CoFeNi/PC also shows a good long-time stability with a high current retention of 96.2% after 12 h of continuous measurement. During the HER process, Co, Fe, Ni can act as active sites and porous carbon facilitates the charge transportation. The abundant active sites and unique architecture lead to the outstanding HER performance of CoFeNi/PC. Keywords CoFeNi/PC · ZIF-67 · Absorption and pyrolysis process · Active sites · Hydrogen evolution reaction
1 Introduction Currently, many researchers pay much attention to develop the sustainable and clean energy due to the drawbacks of traditional fossil fuels, such as environmental pollution, global warming, and wildlife extinction [1,2]. Hydrogen, as a kind of sustainable and clean energy, is a promising candidate to replace traditional fossil fuels. Water splitting is a pivotal method to produce hydrogen [3]. So exploring efficient electrocatalysts is of great importance for the hydrogen evolution reaction (HER). Until now, Pt-based materials are still considered as the electrocatalysts with the best HER activity [4]. However, the high cost and low abundant performance * Jun Dai [email protected] * Youjin Zheng [email protected] 1
Heilongjiang Province Key Laboratory of New Carbon‑Base Functional and Superhard Material, Mudanjiang Normal University, Mudanjiang 157011, China
2
Institute of Chemical Safety, School of Safety Science and Engineering, Henan Polytechnic University, Jiaozuo 454003, China
3
School of Physics and Electronic Engineering, Mudanjiang Normal University, Mudanjiang 157011, China
of Pt-based materials highly limit their widespread applications. It is urgent to explore the catalysts with high efficient, low cost, and earth abundant performance. Metal–organic framework (MOF) materials are constructed by metal ion (II) and organic linkers. They have high specific surface area, tunable pore size, controllable metal centers, excellent physical and chemical stability [5]. MOF materials are widely used in various applications, such as catalysis [6,7], gas adsorption and separation [8,9], drug delivery [10,11], and sensors [12,13]. To date, much effect has been made to broaden the application of MOF materials in electroca
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