Piezoelectric nanofoams with the interlaced ultrathin graphene confining Zn–N–C dipoles for efficient piezocatalytic H2 evolution under low-frequency vibration

Penghui Hu, Xu Yan, Yanhua Lei, Jie Yuan, Rui Lei, Rong Hu, Junkang Chen, Difa Xu, Shiying Zhang, Ping Liu, Xiangchao Zhang, Xiaoqing Qiu, Wenhui Feng