In order to harness the potential of self-propelled miniaturized machines, there has been a sustained effort to increase locomotion in chemically-powered micromotors. Catalytic microdevices, propelled by hydrogen peroxide decomposition to oxygen bubbles, has been the most ubiquitous of them all. The microtubular motors were achieved through a templated-electrodeposition approach with a silver-sputtered polycarbonate membrane, serving as a working electrode in a three-electrode setup. Bimetallic components were accomplished with the sequential electrodeposition of copper, followed by platinum, which serves as the inner catalytic lining. The use of pH to alter the mobility of micromotors is demonstrated in this work through the manipulation of hydrogen peroxide chemistry in different acidity/alkalinity. The addition of sodium hydroxide to increase the pH of the solution led to a consequent increase in activity of micromotors. Meanwhile, introduction of hydrochloric acid led to corrosion of the microstructures, culminating in locomotive changes. Such dramatic changes in activity and velocities of the micromotors allow the usage of this behavior for pH detection. This concept was illustrated in the electrosynthesized tubular bimetallic Cu/Pt micromotors. Alteration of pH shall serve as a useful general strategy for manipulating hydrogen peroxide decomposition in oxygen-bubble propelled catalytic micromotors.