· 논문명 : n-/p- effect induced orientation of electrocatalytic activity of cobalt boro-carbon nitride nanoaggregates

                for fuel reduction/oxidation

·  저    자 : Jayasmita Jana, Tata Sanjay Kanna Sharma, Beena Mol Babu , Ngoc-Diem Huynh , JinSuk Chung , Won Mok Choi **, Seung Hyun Hur *

· 게재지 : International Journal of Hydrogen Energy (2024, 77, 1275-1285)

· 초록

In this work, in situ-generated cobalt oxide was infused into g-BCN to fabricate a heterocomposite (CoBCN) 

with multiple active sites. The electronic structure of CoBCN was further modified via the introduction of n- (Ni) 

and p-(Fe) type metals to investigate the activities of CoBCN-type materials with loosely bound electrons for 

electrocatalytichydrogen evolution reaction (HER), oxygen evolution reaction (OER), and oxygen reduction reaction

(ORR) which symbolize the reduction/oxidation of water and reduction of fuel gas oxygen that goes on in

concurrent electrocatalytic and fuel cell. Experimental results indicated that not only the electronic nature of the

surface but also the binding energy between the involved metals and intermediates varied accordingly for the

association/dissociation steps, resulting in the superiority of p-doped materials in HER and the n-doped material

in the OER and ORR. The HER activity was governed by Fe–CoBCN with an overpotential of 97 mV (@ 10 mAcm-2),

whereas Ni–CoBCN showed superior performance for the OER and ORR with an overpotential and E1/2 of130 mV

(@ 10 mA cm-2) and 0.79 V, respectively.