1T/2H MoSe2-on-MXene heterostructure as bifunctional electrocatalyst for efficient overall water splitting

Li, Nan; Zhang, Yifan; Jia, Meilin; Lv, Xinding; Li, Xitao; Li, Ran; Ding, Xueqin; Zheng, Yan‐Zhen; Tao, Xia

doi:10.1016/j.electacta.2019.134976

Cited by 153 publications

(85 citation statements)

References 49 publications

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“…The two peaks located at 778.5 eV and 793.3 eV are separately assigned to the binding energies of 2p 3/2 and 2p 1/2 of CoÀ P species (Figure 2b), which is consistent with the reported results. [21,22] Similarly, for the Fe 2p region of CoFeP@Ru (Figure 2c), [22,23] the peaks related to the Fe 2P 3/2 and Fe 2p 1/2 are centered at 709.9 and 724.4 eV, respectively, confirming the formation of FeÀ P bond. The binding energies of 711.6 eV can correspond to oxidized Fe from superficial oxidation of CoFeP@Ru.…”

Section: Resultsmentioning

confidence: 67%

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Constructing a Rod‐like CoFeP@Ru Heterostructure with Additive Active Sites for Water Splitting

Liu

et al. 2020

ChemCatChem

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Interfacial engineering and defect modulation can provide abundant active sites for catalysts to further boost the catalysis process. In this work, we develop a strategy to grow multiheterogeneous cobalt phosphide (CoP) nanorods with rich interfaces and defects along the one-dimensional (1D) nanostructure by dual incorporation of Fe and Ru (CoFeP@Ru). Such a catalyst exhibits high activity and stability towards the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER), with overpotentials of only 38 mV in 0.5 M H 2 SO 4 and 48 mV in 1.0 M KOH for HER, and an overpotential of 340 mV in 0.1 M KOH for OER at 10 mA cm À 2. Finally, as the bifunctional catalyst, an alkali electrolyzer is assembled and delivers at a low cell voltage, with almost 100 % Faradaic efficiency. Our experimental results demonstrate that Fe incorporation can disturb or even break the periodic structure of cobalt phosphides, causing a redistribution of the electronic structure and electron density of activity sites, while Ru can significantly enhance the catalytic kinetics, as well as electrochemical and mechanical stability.

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Section: Resultsmentioning

confidence: 67%

“…More importantly, as bifunctional catalyst, the asprepared CoFeP@Ru, reveals an efficient overall water splitting. [14,21]…”

Section: Introductionmentioning

confidence: 99%

Constructing a Rod‐like CoFeP@Ru Heterostructure with Additive Active Sites for Water Splitting

Liu

et al. 2020

ChemCatChem

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“…The CoSe 2 /MoSe 2 catalyst shows a lower overpotential (η 10 of 280 mV) than those of the CoMoO 4 (352 mV), CoSe 2 (322 mV), MoSe 2 (404 mV), and RuO 2 (318 mV), respectively. More importantly, the OER performance of the designed CoSe 2 /MoSe 2 sample exceeds those of recently reported selenide catalysts in OER, for instance, the Ag-CoSe 2 (320 mV) (Zhao et al, 2017), CoSe 2 NCs (430 mV) (Kwak et al, 2016), CoSe 2 /DETA (392 mV) (Guo et al, 2017), NiCo 2 Se 4 holey nanosheets (295 mV) (Fang et al, 2017), NiSe-Ni 0.85 Se/CP (300 mV) (Chen et al, 2018a), SWCNTs/MoSe 2 (295 mV) (Najafi et al, 2019), 1T/2H MoSe 2 (397 mV) (Li et al, 2019), and CoSe 2 @MoSe 2 (309 mV) (Chen et al, 2019c) (Table S2). Furthermore, the corresponding Tafel slope of CoSe 2 /MoSe 2 is 86.8 mV•dec −1 , which is smaller than those of the CoMoO 4 (101.8 mV•dec −1 ), CoSe 2 (124 mV•dec −1 ), MoSe 2 (130 mV•dec −1 ), and RuO 2 (93.4 mV•dec −1 ).…”

Section: Resultsmentioning

confidence: 75%

“…It can decompose water at a low cell voltage of 1.63 V (current density at 10 mA•cm −2 ) ( Figure 6A), and the efficiency is similar to those constituting of the noble-metal-based cathode and anode (RuO 2 vs. Pt/C). Moreover, the overall water splitting performance of the CoSe 2 /MoSe 2 is better than those of other recently reported non-noble metals at the same current density, such as (Ni,Co) 0.85 Se NSAs (1.65 V) (Xiao et al, 2018), a-CoSe/Ti mesh (1.65 V) (Liu et al, 2015), CoO x -CoSe (1.64 V) (Xu et al, 2016), Co 0.85 Se@NC (1.76 V) (Meng et al, 2017), CoB 2 /CoSe 2 (1.73 V) (Guo et al, 2017), NiSe 2 /Ni (1.64 V) (Zhang et al, 2018), 1T/2H MoSe 2 /MXene (1.64 V) (Li et al, 2019), and Ni 3 Se 2 /CF (1.65 V) (Shi et al, 2015) (Table S3). Additionally, CoSe 2 /MoSe 2 electrolyzer exhibits a slight increase in the potential after being cycled for 12 h in alkaline solution (Figure 6B).…”

Section: Resultsmentioning

confidence: 99%

Hierarchical 0D−2D Co/Mo Selenides as Superior Bifunctional Electrocatalysts for Overall Water Splitting

Song

et al. 2020

Front. Chem.

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Development of efficient electrocatalysts combining the features of low cost and high performance for both the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) still remains a critical challenge. Here, we proposed a facile strategy to construct in situ a novel hierarchical heterostructure composed of 0D−2D CoSe 2 /MoSe 2 by the selenization of CoMoO 4 nanosheets grafted on a carbon cloth (CC). In such integrated structure, CoSe 2 nanoparticles dispersed well and tightly bonded with MoSe 2 nanosheets, which can not only enhance kinetics due to the synergetic effects, thus promoting the electrocatalytic activity, but also effectively improve the structural stability. Benefiting from its unique architecture, the designed CoSe 2 /MoSe 2 catalyst exhibits superior OER and HER performance. Specifically, a small overpotential of 280 mV is acquired at a current density of 10 mA•cm −2 for OER with a small Tafel slope of 86.8 mV•dec −1 , and the overpotential is 90 mV at a current density of 10 mA•cm −2 for HER with a Tafel slope of 84.8 mV•dec −1 in 1 M KOH. Furthermore, the symmetrical electrolyzer assembled with the CoSe 2 /MoSe 2 catalysts depicts a small cell voltage of 1.63 V at 10 mA•cm −2 toward overall water splitting.

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“…Li et al [47] proposed a 1T/2H MoSe 2 -on-MXene nanosheet heterostructure (denote as 1T/2H MoSe 2 /MXene) as an efficient electrocatalyst for monolithic water cracking. Benefiting from highly conductive support of MXene, together with excellent conductivity and abundant active sites of 1T/2H phase MoSe 2 , the 1T/2H MoSe 2 /MXene electrocatalyst shows remarkably enhanced HER performance (an overpotential of 95 mV and Tafel slope of 91 mV dec −1 ).…”

Section: Hydrogen Evolution Reactionmentioning

confidence: 99%

Recent Progress in MXene‐Based Materials: Potential High‐Performance Electrocatalysts

Liu

Liang

Ren

et al. 2020

Adv Funct Materials

238

144

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The family of transition metal carbides, nitrides, and carbonitrides (collectively called MXenes) has been a thriving field since the first invention of Ti3C2Tx (MXene) in 2011. MXene is a new type of nanometer 2D sheet material, which exhibits great application potentials in various fields due to its multiple advantages such as high specific surface area, good electrical conductivity, and high mechanical strength. Electrocatalysis is regarded as the core of future clean energy conversion technologies, and MXene‐based materials provide inspiration for the design and preparation of electrocatalysts with high activity, high selectivity, and long loading life time. The applications of MXene‐based materials in electrocatalysis, including hydrogen evolution reaction, nitrogen reduction reaction, oxygen evolution reaction, oxygen reduction reaction, carbon dioxide reduction reaction, and methanol oxidation reaction are summarized in this review. As a crucial session regarding experiments, the current safer and more environmentally friendly preparation methods of MXene are also discussed. Focusing on the materials design and enhancement methods, the key challenges and opportunities for MXene‐based materials as a next‐generation platform in both fundamental research and practical electrocatalysis applications are presented. This account serves to promote future efforts toward the development of MXenes and related materials in the electrocatalysis applications.

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1T/2H MoSe2-on-MXene heterostructure as bifunctional electrocatalyst for efficient overall water splitting

Cited by 153 publications

References 49 publications

Constructing a Rod‐like CoFeP@Ru Heterostructure with Additive Active Sites for Water Splitting

Constructing a Rod‐like CoFeP@Ru Heterostructure with Additive Active Sites for Water Splitting

Hierarchical 0D−2D Co/Mo Selenides as Superior Bifunctional Electrocatalysts for Overall Water Splitting

Recent Progress in MXene‐Based Materials: Potential High‐Performance Electrocatalysts

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