Zeyi Wang , Shuling Liu , Jinyu Du , Yichuang Xing , Yanling Hu , Yujie Ma , Xinyi Lu , Chao Wang
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For the OER in 1 M KOH, (Ni<sub>0.83</sub>Fe<sub>0.17</sub>)<sub>2</sub>P/NF requires low overpotentials of only 215 mV and 247 mV to reach current densities of 10 mA cm<sup>−2</sup> and 50 mA cm<sup>−2</sup>, respectively, which are significantly lower than Ni<sub>2</sub>P/NF and most of the reported metal phosphide materials to date. The high OER activity of (Ni<sub>0.83</sub>Fe<sub>0.17</sub>)<sub>2</sub>P/NF is attributed to the improved intrinsic activity caused by electron interactions between Fe, Ni, and P, which tunes the adsorption energy of the hydroxyl groups, ultimately leading to more facile OER kinetics. The reduced charge transfer resistance, Tafel slope value, and apparent activation energy corroborate the facile kinetics in (Ni<sub>0.83</sub>Fe<sub>0.17</sub>)<sub>2</sub>P/NF. Both (Ni<sub>0.83</sub>Fe<sub>0.17</sub>)<sub>2</sub>P/NF and Ni<sub>2</sub>P/NF involve decoupled electron and proton transfer processes. (Ni<sub>0.83</sub>Fe<sub>0.17</sub>)<sub>2</sub>P/NF also displays good long-term durability, with the conversion of surface metal phosphides to oxides and (oxy)hydroxides observed after prolonged galvanostatic OER tests.</p></div>","PeriodicalId":78,"journal":{"name":"Green Chemistry","volume":"26 13","pages":"Pages 7779-7788"},"PeriodicalIF":9.2000,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Iron-doped nickel phosphide hollow nanospheres synthesized by solvothermal phosphidization of layered double hydroxides for electrocatalytic oxygen evolution†\",\"authors\":\"Zeyi Wang , Shuling Liu , Jinyu Du , Yichuang Xing , Yanling Hu , Yujie Ma , Xinyi Lu , Chao Wang\",\"doi\":\"10.1039/d4gc01389a\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>Active and stable electrocatalysts for the oxygen evolution reaction (OER) are the key to producing hydrogen from alkaline water electrolysis. Here, iron-doped nickel phosphide grown on nickel foam ((Ni<sub>0.83</sub>Fe<sub>0.17</sub>)<sub>2</sub>P/NF) is synthesized by solvothermal phosphidization of NiFe-layered double hydroxides (LDHs) on NF with white phosphorus. (Ni<sub>0.83</sub>Fe<sub>0.17</sub>)<sub>2</sub>P consists of hollow nanospheres with diameters around 50 nm. For the OER in 1 M KOH, (Ni<sub>0.83</sub>Fe<sub>0.17</sub>)<sub>2</sub>P/NF requires low overpotentials of only 215 mV and 247 mV to reach current densities of 10 mA cm<sup>−2</sup> and 50 mA cm<sup>−2</sup>, respectively, which are significantly lower than Ni<sub>2</sub>P/NF and most of the reported metal phosphide materials to date. The high OER activity of (Ni<sub>0.83</sub>Fe<sub>0.17</sub>)<sub>2</sub>P/NF is attributed to the improved intrinsic activity caused by electron interactions between Fe, Ni, and P, which tunes the adsorption energy of the hydroxyl groups, ultimately leading to more facile OER kinetics. The reduced charge transfer resistance, Tafel slope value, and apparent activation energy corroborate the facile kinetics in (Ni<sub>0.83</sub>Fe<sub>0.17</sub>)<sub>2</sub>P/NF. Both (Ni<sub>0.83</sub>Fe<sub>0.17</sub>)<sub>2</sub>P/NF and Ni<sub>2</sub>P/NF involve decoupled electron and proton transfer processes. 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引用次数: 0
摘要
活性稳定的氧进化反应（OER）电催化剂是碱性水电解制氢的关键。这里，掺铁磷化镍生长在泡沫镍上（(Ni0.83Fe0.17)2P/NF）是通过溶液热磷化泡沫镍上的镍碲层双氢氧化物（LDHs）与白磷合成的。(Ni0.83Fe0.17)2P 由直径约为 50 纳米的空心纳米球组成。在 1 M KOH 中进行 OER 时，(Ni0.83Fe0.17)2P/NF 只需要 215 mV 和 247 mV 的低过电位，就能分别达到 10 mA cm-2 和 50 mA cm-2 的电流密度，这明显低于 Ni2P/NF 和迄今报道的大多数金属磷化物材料。(Ni0.83Fe0.17)2P/NF的高OER活性归因于Fe、Ni和P之间的电子相互作用提高了其内在活性，从而调整了羟基的吸附能，最终导致更容易的OER动力学。电荷转移电阻、塔菲尔斜率值和表观活化能的降低证实了（Ni0.83Fe0.17）2P/NF 的简易动力学。(Ni0.83Fe0.17)2P/NF和Ni2P/NF都涉及脱钩的电子和质子转移过程。(Ni0.83Fe0.17)2P/NF还显示出良好的长期耐久性，在长时间的电致静电氧化还原测试后，可观察到表面金属磷化物转化为氧化物和（氧）氢氧化物。
Iron-doped nickel phosphide hollow nanospheres synthesized by solvothermal phosphidization of layered double hydroxides for electrocatalytic oxygen evolution†
Active and stable electrocatalysts for the oxygen evolution reaction (OER) are the key to producing hydrogen from alkaline water electrolysis. Here, iron-doped nickel phosphide grown on nickel foam ((Ni0.83Fe0.17)2P/NF) is synthesized by solvothermal phosphidization of NiFe-layered double hydroxides (LDHs) on NF with white phosphorus. (Ni0.83Fe0.17)2P consists of hollow nanospheres with diameters around 50 nm. For the OER in 1 M KOH, (Ni0.83Fe0.17)2P/NF requires low overpotentials of only 215 mV and 247 mV to reach current densities of 10 mA cm−2 and 50 mA cm−2, respectively, which are significantly lower than Ni2P/NF and most of the reported metal phosphide materials to date. The high OER activity of (Ni0.83Fe0.17)2P/NF is attributed to the improved intrinsic activity caused by electron interactions between Fe, Ni, and P, which tunes the adsorption energy of the hydroxyl groups, ultimately leading to more facile OER kinetics. The reduced charge transfer resistance, Tafel slope value, and apparent activation energy corroborate the facile kinetics in (Ni0.83Fe0.17)2P/NF. Both (Ni0.83Fe0.17)2P/NF and Ni2P/NF involve decoupled electron and proton transfer processes. (Ni0.83Fe0.17)2P/NF also displays good long-term durability, with the conversion of surface metal phosphides to oxides and (oxy)hydroxides observed after prolonged galvanostatic OER tests.
期刊介绍：
Green Chemistry is a journal that provides a unique forum for the publication of innovative research on the development of alternative green and sustainable technologies. The scope of Green Chemistry is based on the definition proposed by Anastas and Warner (Green Chemistry: Theory and Practice, P T Anastas and J C Warner, Oxford University Press, Oxford, 1998), which defines green chemistry as the utilisation of a set of principles that reduces or eliminates the use or generation of hazardous substances in the design, manufacture and application of chemical products. Green Chemistry aims to reduce the environmental impact of the chemical enterprise by developing a technology base that is inherently non-toxic to living things and the environment. The journal welcomes submissions on all aspects of research relating to this endeavor and publishes original and significant cutting-edge research that is likely to be of wide general appeal. For a work to be published, it must present a significant advance in green chemistry, including a comparison with existing methods and a demonstration of advantages over those methods.
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