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Phosphorus‐Doping‐Induced Optimization of Atomic Hydrogen Binding Energy in MoSe2 under High Coverage for Efficient Electrocatalytic Hydrogen Evolution Reactions
ChemistrySelect ( IF 1.9 ) Pub Date : 2021-02-09 , DOI: 10.1002/slct.202004015
Long Zhang 1, 2 , Jiang Li 1 , Zehui Yang 1 , Lan Sun 3 , Guanjun Chen 3 , Wangcong An 1 , Hanyue Cheng 1 , Hongbo Wang 1 , Xingang Wang 1 , Yongnan Chen 1 , Fei Ma 3
ChemistrySelect ( IF 1.9 ) Pub Date : 2021-02-09 , DOI: 10.1002/slct.202004015
Long Zhang 1, 2 , Jiang Li 1 , Zehui Yang 1 , Lan Sun 3 , Guanjun Chen 3 , Wangcong An 1 , Hanyue Cheng 1 , Hongbo Wang 1 , Xingang Wang 1 , Yongnan Chen 1 , Fei Ma 3
Affiliation
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Self‐standing two‐dimensional P‐doped molybdenum diselenide (MoSe2) nanosheets were synthesized on carbon fiber paper (CFP) (P‐doped MoSe2/CFP) using a hydrothermal reaction followed by phosphorization and were subsequently used as a high‐efficiency hydrogen evolution reaction (HER) electrocatalyst. Nanosheet aggregation was remarkably inhibited, and numerous active sites were exposed. The H adsorption and desorption capacities of MoSe2 were optimized by doping P atoms in the MoSe2 lattice. Electrochemical testing indicated that the overpotential (η50) required by P‐doped MoSe2/CFP was only 186 mV, which was much lower than that of the as‐prepared MoSe2/CFP (237 mV). The Tafel slope of P‐doped MoSe2/CFP was 54.3 mV ⋅ dec−1, which was remarkably lower than that of the as‐prepared MoSe2/CFP (79.8 mV ⋅ dec−1). The Gibbs energy of the H atoms adsorbed on P‐doped MoSe2 (ΔGH*) reached the lowest value (0.202 eV) when the hydrogen coverage (θH) was 75 %. For MoSe2, the lowest ΔGH* value was 0.296 eV when θH was 25 %. The adsorption and desorption of H atoms at the active sites of P‐doped MoSe2 occurred easier than at the active sites of MoSe2. Moreover, the P doping effect facilitated the formation of more Hads species during the Volmer reaction and substantially accelerated the kinetics of the HER.
中文翻译:
高覆盖度下磷掺杂诱导的MoSe2中原子氢键能的优化,以实现有效的电催化氢生成反应
自立式二维P掺杂二硒化钼(MoSe 2)纳米片是在碳纤维纸(CFP)(P掺杂MoSe 2 / CFP)上使用水热反应然后进行磷化合成的,随后被用作高效材料氢气析出反应(HER)电催化剂。纳米片的聚集被显着抑制,并且暴露了许多活性位点。通过在MoSe 2晶格中掺杂P原子来优化MoSe 2的H吸附和解吸容量。电化学测试表明,超电势(η 50由p型掺杂的需要)摩西2 / CFP仅为186毫伏,将其多比所制备的摩西降低2/ CFP(237 mV)。P掺杂的MoSe 2 / CFP的Tafel斜率为54.3 mV⋅dec -1,显着低于所制备的MoSe 2 / CFP的Tafel斜率(79.8 mV⋅dec -1)。吸附在P型掺杂的H原子的吉布斯能量摩西2(ΔG H *)达到最低值(0.202 eV)的当氢覆盖率(θ ħ)为75%。对于摩西2,最低的ΔG H *值为0.296电子伏时θ ħ率为25%。在P型掺杂的活性位点上的吸附和H原子的解吸摩西2在摩西的活性位点发生比更容易2。此外,P掺杂效应有助于在Volmer反应期间形成更多的H ads物种,并显着加速了HER的动力学。
更新日期:2021-02-09
中文翻译:
![](https://scdn.x-mol.com/jcss/images/paperTranslation.png)
高覆盖度下磷掺杂诱导的MoSe2中原子氢键能的优化,以实现有效的电催化氢生成反应
自立式二维P掺杂二硒化钼(MoSe 2)纳米片是在碳纤维纸(CFP)(P掺杂MoSe 2 / CFP)上使用水热反应然后进行磷化合成的,随后被用作高效材料氢气析出反应(HER)电催化剂。纳米片的聚集被显着抑制,并且暴露了许多活性位点。通过在MoSe 2晶格中掺杂P原子来优化MoSe 2的H吸附和解吸容量。电化学测试表明,超电势(η 50由p型掺杂的需要)摩西2 / CFP仅为186毫伏,将其多比所制备的摩西降低2/ CFP(237 mV)。P掺杂的MoSe 2 / CFP的Tafel斜率为54.3 mV⋅dec -1,显着低于所制备的MoSe 2 / CFP的Tafel斜率(79.8 mV⋅dec -1)。吸附在P型掺杂的H原子的吉布斯能量摩西2(ΔG H *)达到最低值(0.202 eV)的当氢覆盖率(θ ħ)为75%。对于摩西2,最低的ΔG H *值为0.296电子伏时θ ħ率为25%。在P型掺杂的活性位点上的吸附和H原子的解吸摩西2在摩西的活性位点发生比更容易2。此外,P掺杂效应有助于在Volmer反应期间形成更多的H ads物种,并显着加速了HER的动力学。