RuCo alloy bimodal nanoparticles embedded in N-doped carbon: a superior pH-universal electrocatalyst outperforms benchmark Pt for the hydrogen evolution reaction,Journal of Materials Chemistry A

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RuCo alloy bimodal nanoparticles embedded in N-doped carbon: a superior pH-universal electrocatalyst outperforms benchmark Pt for the hydrogen evolution reaction
Journal of Materials Chemistry A ( IF 10.7 ) Pub Date : 2020-06-15 , DOI: 10.1039/d0ta04491a
Feifei Zhang _{1,

2,

3,

4} , Yinlong Zhu _{1,

2,

3,

4} , Yu Chen _{2,

3,

4,

5} , Yizhihao Lu _{1,

2,

3,

4} , Qian Lin _{1,

2,

3,

4} , Lian Zhang _{1,

2,

3,

4} , Shanwen Tao _{6,

7,

8,

9} , Xiwang Zhang _{1,

2,

3,

4} , Huanting Wang _{1,

2,

3,

4}

Affiliation

Developing cost-effective and high-performance electrocatalysts for hydrogen evolution reaction (HER) in all pH conditions is of great significance for scalable and sustainable hydrogen production through electrochemical water splitting. Herein, a novel hybrid composed of RuCo alloy bimodal nanoparticles embedded in N-doped carbon was prepared from pillar-layered chiral metal–organic frameworks via one facile encapsulation-pyrolysis strategy. Due to the unique hybrid structure and composition, the optimized RuCo@NC-600 (prepared at a pyrolysis temperature of 600 °C) catalyst exhibits outstanding HER catalytic activities in alkaline, acidic, and neutral media. Remarkably, the RuCo@NC-600 achieves a current density of 10 mA cm⁻² at extremely low overpotentials of 34, 6 and 60 mV in 1.0 M KOH, 0.5 M H₂SO₄ and 1.0 M PBS solutions, respectively, superior to the benchmark Pt/C catalyst. In addition, a symmetric two-electrode alkaline electrolyzer device pairing RuCo@NC-600 as both cathode and anode displays excellent performance, along with an impressive stability without noticeable attenuation up to 120 h. This work paves the way to the rational development of efficient pH-universal HER electrocatalysts.

中文翻译：

嵌入N掺杂碳中的RuCo合金双峰纳米颗粒：卓越的pH值通用电催化剂在析氢反应方面优于基准Pt

在所有pH条件下，开发经济高效的高性能氢气分解反应（HER）电催化剂，对于通过电化学水分解生产可扩展且可持续的氢气具有重要意义。在此，通过一种简便的封装-热解策略，从柱状层的手性金属-有机骨架中制备了由嵌入N掺杂碳中的RuCo合金双峰纳米粒子组成的新型杂化体。由于独特的混合结构和组成，优化后的RuCo @ NC-600（在600°C的热解温度下制备）催化剂在碱性，酸性和中性介质中均具有出色的HER催化活性。值得注意的是，RuCo @ NC-600的电流密度为10 mA cm ^-2在1.0 M KOH，0.5 MH ₂ SO ₄和1.0 M PBS溶液中分别以34、6和60 mV的极低过电势优于基准Pt / C催化剂。此外，将RuCo @ NC-600用作阴极和阳极的对称两电极碱性电解槽装置具有出色的性能，并具有令人印象深刻的稳定性，并且在长达120 h内没有明显的衰减。这项工作为有效开发通用pH值的HER电催化剂铺平了道路。

更新日期：2020-06-30

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