Journal ArticleDOI
Breaking the scaling relationship via dual metal doping in a cobalt spinel for the OER: a computational prediction
Yikun Kang,Feiran Zhang,Bowen Liu,Yuanqing Sun,Xiao Zhang,Weiyu Song,Yuechang Wei,Zhen Zhao,Jian Liu +8 more
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TLDR
In this article, a reconstruction of a dominantly exposed (110) surface under reaction conditions is presented using an ab initio thermodynamic approach, and a total of 23 metal doping types are employed based on the reconstructed surface.Abstract:
The lower limit of overpotential derived from the scaling relationship in the generally proposed adsorbate evolution mechanism (AEM) greatly hinders the oxygen evolution reaction (OER) activity in electrochemical energy conversion. The lattice oxygen mechanism tends to be triggered on oxygen-enriched surfaces under in situ conditions; however, the required specific geometry and electronic structure need in-depth exploration. Here, tunable Co3O4 is used as a model material, where the reconstruction of dominantly exposed (110) surface under reaction conditions is first presented using an ab initio thermodynamic approach. We found the geometry of the neighboring oxygen on the reconstructed surface, and oxidized Co3+ with five-fold coordination (Co3+5f) was identified as the active site. A total of 23 metal doping types were employed based on the reconstructed surface. We showed that the OER process with lattice oxygen participating can lead to favorable thermodynamics by the doping of early transition metals, and the O–O coupling of surface lattice oxygen can be facilitated kinetically by dual doping with Zn. Considering both thermodynamics and kinetics, the dual doping of Zn–Cr exhibits theoretical OER activity beyond the conventional AEM limitations and is suggested to be a candidate with enhanced OER performance. Moreover, we demonstrated that the dual doping with Zn enhances metal–oxygen covalency, where the moderate activity of the surface lattice oxygen is required for feasible O–O coupling kinetics while retaining favorable thermodynamic propensity.read more
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Multicomponent transition metal oxides and (oxy)hydroxides for oxygen evolution
Jin-Koo Han,Jingqi Guan +1 more
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Fe doped NiSe2 nanoarrays to boost electrocatalytic oxygen evolution reaction
Zhangmin Tian,Yanxia Liu,Qiucheng Xu,Ying-Hui Shi,Chenxu Ma,Bin Peng,Gui-Zhu Liu,Jianing Yang,Wen Guang Zheng +8 more
TL;DR: In this article , Fe doped transition metal selenides (TMSes) have attracted increasing attention for electrocatalysts due to fascinating properties, such as low cost, intrinsic metallic properties, and high catalytic activities.
Journal ArticleDOI
Surface reconstruction of CoO (111) and its effects on the formation of oxygen vacancy and OER activity
TL;DR: In this paper, the surface reconstruction and its effect on the oxygen vacancy (VO) formation and OER performance of CoO (111) surface were studied using the first principles calculations, which provided a theoretical basis for the design and application of Co-based OER catalysts.
Journal ArticleDOI
Recent Advances and Future Prospects on Ni3S2-Based Electrocatalysts for Efficient Alkaline Water Electrolysis
TL;DR: In this paper , a review comprehensively presents the recent progress of Ni3S2-based electrocatalysts for alkaline water electrocatalysis, and the challenges and perspectives are also analyzed.
References
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Journal ArticleDOI
Generalized Gradient Approximation Made Simple
TL;DR: A simple derivation of a simple GGA is presented, in which all parameters (other than those in LSD) are fundamental constants, and only general features of the detailed construction underlying the Perdew-Wang 1991 (PW91) GGA are invoked.
Journal ArticleDOI
Efficient iterative schemes for ab initio total-energy calculations using a plane-wave basis set.
Georg Kresse,Jürgen Furthmüller +1 more
TL;DR: An efficient scheme for calculating the Kohn-Sham ground state of metallic systems using pseudopotentials and a plane-wave basis set is presented and the application of Pulay's DIIS method to the iterative diagonalization of large matrices will be discussed.
Journal ArticleDOI
Efficiency of ab-initio total energy calculations for metals and semiconductors using a plane-wave basis set
Georg Kresse,Jürgen Furthmüller +1 more
TL;DR: A detailed description and comparison of algorithms for performing ab-initio quantum-mechanical calculations using pseudopotentials and a plane-wave basis set is presented in this article. But this is not a comparison of our algorithm with the one presented in this paper.
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Combining theory and experiment in electrocatalysis: Insights into materials design
Zhi Wei Seh,Zhi Wei Seh,Zhi Wei Seh,Jakob Kibsgaard,Jakob Kibsgaard,Jakob Kibsgaard,Colin F. Dickens,Colin F. Dickens,Ib Chorkendorff,Jens K. Nørskov,Jens K. Nørskov,Thomas F. Jaramillo,Thomas F. Jaramillo +12 more
TL;DR: A unified theoretical framework highlights the need for catalyst design strategies that selectively stabilize distinct reaction intermediates relative to each other, and opens up opportunities and approaches to develop higher-performance electrocatalysts for a wide range of reactions.
Journal ArticleDOI
Improved tangent estimate in the nudged elastic band method for finding minimum energy paths and saddle points
Graeme Henkelman,Hannes Jónsson +1 more
TL;DR: An improved way of estimating the local tangent in the nudged elastic band method for finding minimum energy paths is presented, and examples given where a complementary method, the dimer method, is used to efficiently converge to the saddle point.