Two‐dimensional transition‐metal dichalcogenides have been widely studied as electrocatalysts for the hydrogen evolution reaction (HER). However, limited active sites and poor conductivity hinder their application. To solve these disadvantages, heteroatom doping has attracted wide attention because it can not only increase the active sites but also affect the intrinsic catalytic properties of the electrocatalyst. Herein, we grew vanadium‐doped WS₂ nanosheets on carbon cloth (V‐WS₂/CC) as an electrocatalyst for HER under acidic and alkaline conditions. With a proper vanadium doping concentration, the electrochemical surface areas of V_0.065‐WS₂/CC were 9.6 and 2.6 times as large as that of pure WS₂ electrocatalyst under acidic and alkaline conditions, respectively. In addition, the charge‐transfer resistance also decreased with moderate vanadium doping. Based on this, the synthesized vanadium‐doped WS₂ nanosheets exhibited good stability with high HER catalytic activity and could reach a current density of 10 mA cm⁻² at overpotentials of 148 and 134 mV in 0.5 m H₂SO₄ and 1 m KOH, respectively. The corresponding Tafel slopes were 71 and 85 mV dec⁻¹. Therefore, our synthesized vanadium‐doped WS₂ nanosheets can be a promising electrocatalyst for the production of hydrogen over a wide pH range.

中文翻译：

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钒掺杂的WS2纳米片生长在碳布上，作为氢生成反应的高效电催化剂

二维过渡金属二卤化物已被广泛用作氢释放反应（HER）的电催化剂。然而，有限的活性位和差的电导率阻碍了它们的应用。为了解决这些缺点，杂原子掺杂引起了广泛的关注，因为它不仅可以增加活性位点，而且可以影响电催化剂的固有催化性能。在此，我们在碳布（V-WS ₂ / CC）上生长了掺钒的WS ₂纳米片，作为在酸性和碱性条件下HER的电催化剂。在适当的钒掺杂浓度下，V _0.065 -WS ₂ / CC的电化学表面积分别是纯WS _2的9.6和2.6倍电催化剂分别在酸性和碱性条件下。此外，适度的钒掺杂也降低了电荷转移电阻。基于此，合成的钒掺杂的WS ₂纳米片表现出良好的稳定性和较高的HER催化活性，并且在0.5 m H ₂ SO ₄和1  m KOH中的过电势分别为148和134 mV时 可以达到10 mA cm ^-2的电流密度。， 分别。相应的塔菲尔斜率是71和85 mV dec ^-1。因此，我们合成的钒掺杂的WS ₂纳米片可以成为在宽pH范围内生产氢的有希望的电催化剂。