In Situ Polymerization of Phytic Acid to Enhance the Electrocatalytic Stability of Mn-CoP Nanowire Arrays

ZOU Xi-fei; WEI Dong-ping; ZHAO Wei; XIE Zhou-jian; LUO Zhi-rong; MI Yan

doi:10.12452/j.fxcsxb.24030704

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In Situ Polymerization of Phytic Acid to Enhance the Electrocatalytic Stability of Mn-CoP Nanowire Arrays

Scientific Papers | 更新时间：2024-12-13

- In Situ Polymerization of Phytic Acid to Enhance the Electrocatalytic Stability of Mn-CoP Nanowire Arrays
- Journal of Instrumental Analysis Vol. 43, Issue 12, Pages: 1911-1918(2024)
- 作者机构：
  
  1.广西民族大学林产化学与工程国家民委重点实验室，广西南宁 530006
  2.百色学院　化学与环境工程学院，广西百色 533000
- 作者简介：
- 基金信息：
- DOI：10.12452/j.fxcsxb.24030704
  CLC： O657.1
- Published：15 December 2024，
  
  Received：07 March 2024，
  
  Revised：25 May 2024，
- 稿件说明：
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邹习飞,韦冬萍,赵薇,谢周鉴,罗志荣,米艳.原位聚合植酸提升Mn-CoP纳米线阵列的电催化稳定性[J].分析测试学报,2024,43(12):1911-1918.

ZOU Xi-fei,WEI Dong-ping,ZHAO Wei,XIE Zhou-jian,LUO Zhi-rong,MI Yan.In Situ Polymerization of Phytic Acid to Enhance the Electrocatalytic Stability of Mn-CoP Nanowire Arrays[J].Journal of Instrumental Analysis,2024,43(12):1911-1918.
邹习飞,韦冬萍,赵薇,谢周鉴,罗志荣,米艳.原位聚合植酸提升Mn-CoP纳米线阵列的电催化稳定性[J].分析测试学报,2024,43(12):1911-1918. DOI： 10.12452/j.fxcsxb.24030704.

ZOU Xi-fei,WEI Dong-ping,ZHAO Wei,XIE Zhou-jian,LUO Zhi-rong,MI Yan.In Situ Polymerization of Phytic Acid to Enhance the Electrocatalytic Stability of Mn-CoP Nanowire Arrays[J].Journal of Instrumental Analysis,2024,43(12):1911-1918. DOI： 10.12452/j.fxcsxb.24030704.

摘要

具有良好稳定性的电催化剂对于大规模电解水制氢具有非常重要的现实意义。该文通过植酸和吡咯在Mn掺杂CoP（Mn-CoP）纳米阵列表面原位聚合，进一步热处理获得了薄碳层均匀包裹的C@Mn-CoP电催化剂。实验表明，该催化剂在碱性和含尿素的碱性电解液中均表现出良好的电化学稳定性。在1 mol/L KOH+0.5 mol/L 尿素电解液中，于10 mA/cm

的电流密度下可稳定工作200 h以上；在1 mol/L KOH中经过2 000圈的CV循环后，其析氢性能在100 mA/cm

处的电位增量仅为4 mV；在多电流阶跃测试中，每个电流密度下的电位保持恒定，证明表面聚合植酸在提高电催化剂稳定性方面极具应用潜力。

Abstract

Electrocatalysts with excellent stability are of great relevance for large-scale water electrolysis for hydrogen production. In this work，C@Mn-CoP elect

rocatalyst was obtained by in situ polymerizing phytic acid and pyrrole on the surface of synthesized Mn-doped CoP（Mn-CoP） nanoarrays，which was further carbonized to form a uniform thin carbon protective layer. Experiment results have shown that the C@Mn-CoP electrode demonstrated a preeminent electrochemical stability in both alkaline and containing urea alkaline electrolytes. It can stable work for more than 200 h at a current density of 10 mA/cm

in 1 mol/L KOH + 0.5 mol/L urea for water splitting. After 2 000 cycles of CV scan in 1 mol/L KOH at a current density of 100 mA/cm

，the increment HER over potential is only as small as 4 mV. And the potential remains almost constant at each current density in multi-current step test curves. All of them demonstrate that the in situ polymerization of phytic acid has great application potential in improving the stability of electrocatalysts.

关键词

Mn掺杂原位植酸界面聚合电催化析氢纳米线阵列电化学稳定性

Keywords

Mn dopingin situ phytic acid polymerizationelectrocatalytic hydrogen evolutionnanowire arrayselectrochemical stability

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College of Chemistry and Environmental Engineering，Baise University

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