Recent advances in rare-earth-based materials for electrocatalysis

Wang, Xuan; Tang, Yawen; Lee, Jongmin; Fu, Gengtao

doi:10.1016/j.checat.2022.02.007

Cited by 115 publications

(76 citation statements)

References 262 publications

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“…More importantly, pyrolysis of the rare-earth MOF (NiY-BTC) to form NiY/C can introduce the rare-earth oxide (Y 2 O 3 ) to improve the electron transfer ability of the catalyst. The paired d-orbital electrons of transition metals can accelerate the transfer of electrons to water molecules and the successive dissociation of O–H bonds to complete the Volmer step, and the half-space valence orbitals of the rare-earth elements can facilitate the adsorption of H atoms to the catalyst surface to complete the Tafel step . Also, the accession of the Co/C can increase the content of Co-N, thereby enhancing the ORR performance.…”

Section: Resultsmentioning

confidence: 99%

Rare-Earth-Based Bimetallic Metal–Organic Frameworks Promote Oxygen Electrocatalysis for Rechargeable Zn–Air Batteries

Liu

Peng

Kang

et al. 2022

ACS Sustainable Chem. Eng.

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Metal−organic frameworks (MOF) are versatile and good structurally stable materials that are widely used in energy conversion and storage. In this work, rare-earth-based bimetallic metal−organic framework (NiY-BTC) nanorods anchored with transition metal−organic frameworks (ZIF-67) were used as versatile precursors to prepare novel metal/rare-earth metal oxidecoupled carbon-based bifunctional oxygen electrocatalysts (NiY/C@Co/C). Due to the stable nanorods framework structure, appropriate Y 2 O 3 active center, and richness of Co−N sites in the carbon skeletons, the NiY/C@Co/C catalyst exhibits high onset potentials (E onset = 0.928 V) and half-wave potential (E 1/2 = 0.83 V) for the oxygen reduction reaction (ORR), and expresses a low overpotential (η = 392 mV@10 mA cm −2 ) for the oxygen evolution reaction (OER). Moreover, a rechargeable Zn−air battery assembled with NiY/C@Co/C as the air cathode catalyst displayed a great specific capacity (899.6 mAh gZn −1 ) and a remarkable peak power density of 102.2 mW cm −2 , as well as excellent durability and stability. This work delivers a way using rare-earth metal− organic frameworks to get the corresponding metal oxide-coupled carbon-based bifunctional oxygen electrocatalysts for rechargeable Zn−air batteries.

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Section: Resultsmentioning

confidence: 99%

Rare-Earth-Based Bimetallic Metal–Organic Frameworks Promote Oxygen Electrocatalysis for Rechargeable Zn–Air Batteries

Liu

Peng

Kang

et al. 2022

ACS Sustainable Chem. Eng.

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“…As displayed in Figure 5 c, the Tafel slope of the as-synthesized NiCo-LDH RDC@CNTs was calculated to be about 78.23 mV Dec −1 , which was smaller than that of the ZIF-67@CNT intermediate (95.42 mV dec −1 ), ZIF-67 (78.31 mV dec −1 ), Co(OH) 2 (78.73 mV dec −1 ), and commercial RuO 2 (155.04 mV dec −1 ). Furthermore, the Tafel slope value of NiCo-LDH RDC@CNTs was within the scope of 60–120 mV dec −1 , demonstrating that the chemical adsorption of OH − step controls the OER kinetics (i.e., M + OH − → M-OH + e − ) [ 40 , 41 ].…”

Section: Resultsmentioning

confidence: 99%

Carbon Nanotubes Interconnected NiCo Layered Double Hydroxide Rhombic Dodecahedral Nanocages for Efficient Oxygen Evolution Reaction

Huang

Lin

et al. 2022

Nanomaterials

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Proper control of a 3d transition metal-based catalyst with advanced structures toward oxygen evolution reaction (OER) with a more feasible synthesis strategy is of great significance for sustainable energy-related devices. Herein, carbon nanotube interconnected NiCo layered double hydroxide rhombic dodecahedral nanocages (NiCo-LDH RDC@CNTs) were developed here with the assistance of a feasible zeolitic imidazolate framework (ZIF) self-sacrificing template strategy as a highly efficient OER electrocatalyst. Profited by the well-fined rhombic dodecahedral nanocage architecture, CNTs’ interconnected characteristic and structural feature of the vertically aligned nanosheets, the as-synthesized NiCo-LDH RDC@CNTs integrated large exposed active surface areas, enhanced electron transfer capacity and multidimensional mass diffusion channels, and thereby collaboratively afforded the remarkable electrocatalytic performance of the OER. Specifically, the designed NiCo-LDH RDC@CNTs exhibited a distinguished OER activity, which only required a low overpotential of 255 mV to reach a current density of 10 mA cm−2 for the OER. For the stability, no obvious current attenuation was detected, even after continuous operation for more than 27 h. We certainly believe that the current extraordinary OER activity combined with the robust stability of NiCo-LDH RDC@CNTs enables it to be a great candidate electrocatalyst for economical and sustainable energy-related devices.

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“…[83] As a result of the ability of the 4f orbitals to polarize the 5d orbitals and, thus, enhance the interactions with the 3d orbitals, the coupling of 4f electrons with the s and d conduction electrons results in the optimized geometric and electronic structure of RE-based materials. In particular, the 4f electrons are delocalized into a 4f band and can undergo orbitally selective Mott transitions, [84,85] especially in RE SACs. These Mott transitions in RE SACs and covalent contributions resulting from hybridization with the valence orbitals of light elements show the usefulness of the 4f orbitals in optimizing the density of states (DOS) close to E F and ε d and promoting the transfer of electrons from the valence band (VB) to the conduction band (CB) in periodic solids.…”

Section: Theoretical Advantages Of Re Sacsmentioning

confidence: 99%

Rare‐Earth Single‐Atom Catalysts: A New Frontier in Photo/Electrocatalysis

Wang

Zhu

et al. 2022

Small Methods

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through three steps: 1) at the catalyst surface, the reactants diffuse toward the active sites; 2) the reactants are adsorbed at the active sites and transformed into products via consecutive elementary reaction steps; 3) the products diffuse from the surface via chemical desorption. [4][5][6] To facilitate this transformational process, the catalytically active surface should contain many highly catalytically active sites. [7][8][9][10] However, in conventional bulk catalysts, typically, only a few surface atoms provide catalytic activity, and most of the subsurface atoms cannot directly participate in the reactions, thus resulting in atomic waste. [11][12][13][14][15] Recently, more efficient catalysts have been prepared by changing the active sites from those of a bulk catalyst to isolated atoms; these systems are known as single-atom catalysts (SACs). Thus, the term SAC is given to materials whose catalytically active sites are single atoms. The first discussion of SACs can be traced back to 2011, Zhang et al. reported Pt atoms anchored on FeO x (Pt 1 /FeO x ) for CO oxidation. [16] Crucially, when the size of catalysts reaches the atomic scale, distinctive properties that affect their chemical activities, conversion efficiencies, and stabilities emerge. In particular, unlike bulk catalysts, SACs maximize the use of the catalytically active metal atoms (nearly 100% atom efficiency). [17][18][19][20] Further, compared with bulk catalysts, SACs have unique advantages: 1) an unsaturated coordination environment that affects the affinity of the catalyst for intermediate species; 2) distinctive quantum size effects that yield discrete energy levels and frontier molecular orbital (FMO) occupancies; 3) strong atom support interactions that facilitate surface charge redistribution; 4) appropriate polarity to restrain shuttle effects during catalytic processes; 5) breaking of the energy scaling relationship based on the Sabatier principle for enhanced catalytic activity; and 6) site-to-site interactions between single atoms that enhance the catalytic kinetics. [21][22][23][24][25][26][27][28] In recent years, the use of transition-metal-based SACs [29][30][31] and precious-metal-based SACs [32][33][34] has developed rapidly, especially in the field of energy catalysis. In particular, research has focused on Fe, [35][36][37] Co, [38,39] Ni, [40,41] Mn, [42] Pt, [43,44] Ir, [45][46][47] Pd. [48,49] Owing to the strong atom-support interactions, the coupling of the metal and ligand orbitals in the support can result in changes in the d-band center (ε d ) of the metal atoms, [50,51] and this spin-orbit coupling, which results in a range of electronic states, is key to the success of heterogeneous Single-atom catalysts (SACs) provide well-defined active sites with 100% atom utilization, and can be prepared using a wide range of support materials. Therefore, they are attracting global attention, especially in the fields of energy conversion and storage. To date, research has focused on transitionmetal and precious-metal-bas...

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Recent advances in rare-earth-based materials for electrocatalysis

Cited by 115 publications

References 262 publications

Rare-Earth-Based Bimetallic Metal–Organic Frameworks Promote Oxygen Electrocatalysis for Rechargeable Zn–Air Batteries

Rare-Earth-Based Bimetallic Metal–Organic Frameworks Promote Oxygen Electrocatalysis for Rechargeable Zn–Air Batteries

Carbon Nanotubes Interconnected NiCo Layered Double Hydroxide Rhombic Dodecahedral Nanocages for Efficient Oxygen Evolution Reaction

Rare‐Earth Single‐Atom Catalysts: A New Frontier in Photo/Electrocatalysis

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