韩敏教授课题组和戴志晖教授课题组合作在CHEMCATCHEM发表研究论文

时间:2020-07-16 来源:化科院 点击数:

Versatile Synthesis of Pd-M (M=Cr, Mo, W) Alloy Nanosheets Flower-like Superstructures for Efficient Oxygen Reduction Electrocatalysis
Zhang, XS (Zhang, Xiaoshu)[ 1,2,3 ] ; Fan, JY (Fan, Jiayao)[ 1,2,4 ] ; Han, M (Han, Min)[ 1,2,3,6 ]*(韩敏); Zhao, SL (Zhao, Shulin)[ 1,2 ] ; Lu, LZ (Lu, Linzhi)[ 1,2 ] ; Xu, DD (Xu, Dongdong)[ 1,2 ] ; Lin, Y (Lin, Yue)[ 4 ]*; Shi, NE (Shi, Naien)[ 5 ] ; Liu, Y (Liu, Ying)[ 1,2 ] ; Lan, YQ (Lan, Ya-Qian)[ 1,2 ] ; Bao, JC (Bao, Jianchun)[ 1,2 ] ; Dai, ZH (Dai, Zhihui)[ 1,2 ]*(戴志晖)


[ 1 ] Nanjing Normal Univ, Jiangsu Key Lab New Power Batteries, Sch Chem & Mat Sci, Nanjing 210023, Peoples R China
[ 2 ] Nanjing Normal Univ, Jiangsu Key Lab Biofunct Mat, Sch Chem & Mat Sci, Nanjing 210023, Peoples R China
[ 3 ] China Three Gorges Univ, Coll Mat & Chem Engn, Key Lab Inorgan Nonmet Crystalline & Energy Conve, Yichang 443002, Peoples R China
[ 4 ] Univ Sci & Technol China, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Peoples R China
[ 5 ] Nanjing Univ Posts & Telecommun, Inst Adv Mat IAM, Nanjing 210023, Peoples R China
[ 6 ] Nanjing Univ, State Key Lab Coordinat Chem, Nanjing Natl Lab Solid State Microstruct, Nanjing 210093, Peoples R China


CHEMCATCHEM,202006,10.1002/cctc.202000443


Pd-based nanoalloys are promising electrocatalysts for replacing Pt-based ones toward oxygen reduction reaction. Despite that great progress has been achieved, universally synthesizing Pd-based alloy nanosheets and further integrating them into porous or hierarchical superstructures remain a challenge, and their ORR performances are not systematically investigated. Herein, novel ultrathin and highly wrinkled Pd-M (M=Cr, Mo, W) alloy nanosheets flower-like superstructures (NSFSs) are universally fabricatedviaa polyether and small molecules/ions ligand assisted solvothermal method. Such Pd-M NSFSs possess mesoporous structures and co-exist single-atom-like and cluster-like M species on their surfaces. Compared with pure Pd NSFSs, those Pd-M NSFSs show greatly enhanced ORR activity in alkaline media. Due to the unique microstructure feature, proper alloy constituent and stronger interatomic polarization or electronic coupling, the Pd-W NSFSs show the highest ORR activity with the half-wave potential of 0.89 V (vs. RHE) and mass activity of 0.46 A mg(Pd)(-1)at 0.90 V (vs. RHE), outperforming commercial Pt/C, and most of reported Pd(or Pt)-based catalysts. Moreover, the Pd-W NSFSs manifest outstanding durability and anti-CO poisoning ability yet. This work may spur the development of 2D Pd-based nanoalloy superstructures and promote their applications in fuel cells or other clean energy fields.

文章链接:
https://chemistry-europe.onlinelibrary.wiley.com/doi/full/10.1002/cctc.202000443

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