Dendritic α-Bi<sub>2sub>O<sub>3sub>/Bi<sub>2sub>O<sub>2sub>CO<sub>3sub> biphasic heterostructures.
Plasmonic Au NPs and Au NRs with different length and diameter.
Synergetic effect of α-Bi<sub>2sub>O<sub>3sub>/Bi<sub>2sub>O<sub>2sub>CO<sub>3sub> interface and SPR of Au NSs or Au NRs.
Au NSs brought ∼4 times increase in activity and Au NRs 5–11 times.