Pu, Z., Amiinu, I. S., Cheng, R., Wang, P., Zhang, C., Mu, S., Zhao, W., Su, F., Zhang, G., Liao, S. and Sun, S. (2020) “Single-Atom Catalysts for Electrochemical Hydrogen Evolution Reaction: Recent Advances and Future Perspectives”, Nano-Micro Letters, 12, p. 21. doi: 10.1007/s40820-019-0349-y.