Achieving an Efficient Hydrogen Evolution Reaction with a Bicontinuous Nanoporous PtNiMg Alloy of Ultralow Noble-metal Content at an Ultrawide Range of Current Densities
Achieving an Efficient Hydrogen Evolution Reaction with a Bicontinuous Nanoporous PtNiMg Alloy of Ultralow Noble-metal Content at an Ultrawide Range of Current Densities
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超低贵金属含量双连续纳米孔 PtNiMg 合金在超宽电流密度范围内实现高效析氢反应
DOI：
10.1016/j.cej.2022.134571
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发表时间：
2022-01
影响因子：
15.1
通讯作者：
Duosheng Li
中科院分区：
文献类型：
--
作者：
Yufeng Zheng;Pengfei Shang;Feng Pei;Guang Ma;Zhiguo Ye;Xinyuan Peng;Duosheng Li
超低贵金属含量的双连续纳米孔 PtNiMg 合金在碱性介质中在超宽范围的 HER 电流密度下实现了极低的析氢反应 (HER) 过电势和塔菲尔斜率。综合研究表明，3D双连续纳米孔结构、Ni和Pt物种的完美协同效应、高结构稳定性和优异的导电性极大地提高了新型合金的电催化活性和长期稳定性。 • 纳米级柯肯达尔效应实现了超低贵金属含量的纳米多孔合金。 • 实现极低的析氢反应过电势和塔菲尔斜率。 • 独特的架构成就卓越的性能。由间歇性地热、风能和太阳能产生的绿色电力提供动力的电化学水分解由于其可持续和清洁的特性，是实现大规模制氢的一种有前景的方法。开发具有高电催化活性和长期稳定性的用于超高电流密度（>1000 mA cm -2 ）析氢反应（HER）的电催化剂仍然需要突破。在这里，通过基于纳米级柯肯达尔效应的简便高温烧结方法制备了具有超低贵金属含量的双连续纳米孔 PtNiMg 合金。双连续纳米多孔合金电极在碱性介质中用于HER的超低含量约为1 at % Pt，在10 mA cm -2 的电流密度和Volmer-Tafel机制的Tafel斜率（30.9 mV dec -1 ）下实现了22 mV的极低过电势。用于HER的合金电极在1-2000 mA cm -2 的宽电流密度下在碱性介质中表现出优异的稳定性。 1-PtNiMg-900合金的3D双连续纳米孔结构、Ni和Pt物种的完美协同效应、高结构稳定性和优异的导电性在超宽范围的HER电流密度下实现了出色的电催化活性和长期稳定性。该研究通过新颖的制备方法极大地提高了Pt基HER电催化剂的电化学性能，为H 2 生产的大规模工业应用提供了可能性。
A bicontinuous nanoporous PtNiMg alloy of ultralow noble-metal content achieves an extremely low overpotential and Tafel slope of the hydrogen evolution reaction (HER) at an ultrawide range of HER current densities in an alkaline medium. Comprehensive studies reveal that the 3D bicontinuous nanoporous structure, perfect synergistic effect of Ni and Pt species, high structural stability and excellent conductivity dramatically improves the electrocatalytic activity and long-term stability of the new type of alloy. • The nanoscale Kirkendall effect achieves a nanoporous alloy of ultralow noble-metal content. • Achieves an extremely low overpotential and Tafel slope of the hydrogen evolution reaction. • The distinctive architecture accomplishes the outstanding performance. Electrochemical water splitting powered by green electricity generated from intermittent geothermal, wind and solar power is a promising approach to realize large-scale hydrogen production owing to its sustainable and clean characteristics. Developing electrocatalysts with high electrocatalytic activity and long-term stability for the hydrogen evolution reaction (HER) at an ultrahigh current density (>1000 mA cm −2 ) still needs a breakthrough. Here, a bicontinuous nanoporous PtNiMg alloy with an ultralow noble metal content for the HER is fabricated by a facile high-temperature sintering method based on the nanoscale Kirkendall effect. A bicontinuous nanoporous alloy electrode with an ultralow content of approximately 1 at % Pt for the HER in an alkaline medium achieves an extremely low overpotential of 22 mV at a current density of 10 mA cm −2 and a Tafel slope (30.9 mV dec -1 ) of the Volmer-Tafel mechanism. The alloy electrode for the HER at a wide current density of 1–2000 mA cm −2 displays superior stability in alkaline media. The 3D bicontinuous nanoporous structure, perfect synergistic effect of Ni and Pt species, high structural stability and excellent conductivity of the 1-PtNiMg-900 alloy achieve outstanding electrocatalytic activity and long-term stability at an ultrawide range of HER current densities. This study greatly improves the electrochemical performance of Pt-based electrocatalysts for the HER via a novel fabrication approach and provides the possibility of large-scale industrial application for H 2 production.
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用于碱性析氢反应的原子偏聚 Pt-Ni 纳米催化剂的 OH 驱动合成
影响因子：
11.9
作者：
Zhang Cong;Chen Biaohua;Mei Donghai;Liang Xin
通讯作者：
Liang Xin
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DOI：
10.1021/acssuschemeng.0c00783
发表时间：
2020-06
期刊：
ACS Sustainable Chemistry & Engineering
影响因子：
--
作者：
Pengfei Shang;Zhiguo Ye;Yi Ding;Zhixiang Zhu;Xinyuan Peng;Guang Ma;Duosheng Li
通讯作者：
Duosheng Li
DOI：
10.1016/j.apcatb.2018.02.034
发表时间：
2018-08
期刊：
Applied Catalysis B: Environmental
影响因子：
--
作者：
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通讯作者：
Lishang Zhang;Jiajia Lu;Shibin Yin;Lin Luo;Shengyu Jing;A. Brouzgou;Jian-hua Chen;P. Shen;P. T
影响因子：
56.9
作者：
Chen, Chen;Kang, Yijin;Stamenkovic, Vojislav R.
通讯作者：
Stamenkovic, Vojislav R.