· 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.