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Abstract:
Spherical-structured nano-/micromaterials with tunable shell architectures and compositions are becoming increasingly important and attractive for electrochemical energy conversion and storage. Herein, we report the synthesis of novel Ni-Co alloy@carbon microspheres by calcining Co/Ni bimetallic metal-organic frameworks (MOFs) prepared by a facile solvothermal reaction. Their structures, dimensions and electrochemical performance can be optimized by simply tuning the Co/Ni molar ratio. Benefiting from the advantageous structural and compositional features, the obtained Ni-Co alloy@carbon microspheres display exceptional electrochemical performance when used as counter electrode (CE) catalysts for dye-sensitized solar cells (DSSCs). In particular, the optimized NiCo0.2@C CE delivers an impressive power conversion efficiency (PCE) of 9.30%, showing a similar to 15.7% enhancement compared to that of Pt CE (8.04%). Additionally, the NiCo0.2@C CE also demonstrates a good long-term electrochemical stability for the I-3 (-)/I- electrolyte. This work may provide new options for the design and preparation of efficient electrocatalysts with novel morphologies and desirable compositions.
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CHEMICAL ENGINEERING JOURNAL
ISSN: 1385-8947
Year: 2018
Volume: 334
Page: 419-431
8 . 3 5 5
JCR@2018
1 3 . 4 0 0
JCR@2023
ESI Discipline: ENGINEERING;
ESI HC Threshold:170
JCR Journal Grade:1
CAS Journal Grade:1
Cited Count:
WoS CC Cited Count: 107
SCOPUS Cited Count: 111
ESI Highly Cited Papers on the List: 5 Unfold All
WanFang Cited Count:
Chinese Cited Count:
30 Days PV: 0
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