Titanium-doped copper oxide/ruthenium heterostructure constructed on Cu3Ti nanosheet for efficient hydrogen evolution reaction in alkaline media

Ma, Zhiyuan; Wang, Qingbing; Du, Yiyang; Li, Zhaolong; Dong, Junjie; Qi, Zhengqiu; Zhang, Xiaoyan; Yu, Bo; Guo, Bingshu; Chen, Junchen; Wang, Mingshan; Jia, Yanlin; Zhou, Liujiang; Yi, Jiang; Zhang, Jin; Li, Xing; Zhang, Jing

doi:10.1016/j.apsusc.2023.158474

Cited by 2 publications

(1 citation statement)

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“…This result is not unexpected since it is well-known that the Ru metal is able to lower the water dissociated energy, which facilitates the corresponding HER performance in an alkaline electrolyte. 30,31 The above observation for different trends toward HER activity among members in the ZrCo 1.75 M 0.25 and NbCo 1.75 M 0.25 series is quite intriguing. Especially for the HER performance of ZrCo 1.75 Rh 0.25 , it only requires overpotential (η) values of 8 and 17 mV to reach the current density of 10 mA/cm 2 in acid and alkaline electrolytes, respectively, which outperforms most of the electrocatalysts reported so far (Figure 3, Tables S8 and S9).…”

Section: ■ Results and Discussionmentioning

confidence: 93%

Correlation between d Electrons and the Sweet Spot for the Hydrogen Evolution Reaction: Is Platinum Always the Best Electrocatalyst?

Hao,

Guan,

Zhang

et al. 2024

Inorg. Chem.

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Herein, two Laves intermetallic series, ZrCo1.75 M 0.25 and NbCo1.75 M 0.25 (M = Fe, Co, Ni, Ru, Rh, Pd, Os, Ir, and Pt), were synthesized, and their hydrogen evolution reaction (HER) activities were examined to reveal the influence of d electrons to the corresponding HER activities. Owing to the different electronegativity between Zr and Nb (χZr = 1.33; χNb = 1.60), Co and/or M elements receive more electrons in ZrCo1.75 M 0.25 than that of the Nb one. This leads to the overall weak H adsorption energy (ΔG Had) of ZrCo1.75 M 0.25 series compared to that of NbCo1.75 M 0.25 and rationalizes well the superior HER activity of the Rh member compared to that of the Pt one in the ZrCo1.75 M 0.25 series. Under industrial conditions (333 K, 6.0 M KOH), ZrCo1.75Rh0.25 only requires an overpotential of 110 mV to reach the current density of 500 mA/cm2 and can be operated at high current density over 400 h. This work demonstrates that with a proper combination between elements in intermetallic phases, one can manipulate d electrons of the active metal to be closer to the sweet spot (ΔG Had = 0). The Pt member may no longer exhibit the best HER activity in series, and all elements exhibit the potential to outperform the Pt member in the HER with careful control of the d electron population.

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Section: ■ Results and Discussionmentioning

confidence: 93%