Performance of Ni-Cu bimetallic co-catalyst g-C
3
N
4
nanosheets for improving hydrogen evolution
Zhiliang Jin
a
,
b
,
c
,
*
(
), Lijun Zhang
a
,
b
,
c
,
*
(
)
.
Fig. 4..
SEM pictures of g-C
3
N
4
(a), CNC (b), CNN-15 (c) and CNNC-15 (d).