Article A Principle for Highly Active Metal Oxide Catalysts via NaCl-Based Solid Solution Yuan Shu, 1Hao Chen,3 Nanqing Chen,3 Xiaolan Duan,1 Pengfei Zhang,,6 * Shize Yang,4 5 Zhenghong Bao, 2Zili Wu, and Sheng Dai2,3 SUMMARY Toward the preparation of …