Highly efficient catalysis and monitoring play an extremely important role in the modern chemical industry. The local thermal charge density, which is proportional to the square of the local near-field enhancement, is essential to improve the catalytic efficiency. However, the vibration-free way to improve the local hot charge density at the surfaces of the catalyst still needs to be investigated. Optical energy is one of the most promising green energy sources in the natural environment. Here, we designed a pyroelectric nanogenerator by absorbing optical energy as surface enhanced Raman scattering (SERS) substrate for in-situ monitoring the complete oxidation reaction from 4-aminothiophenol (4-ATP) to 4-nitrothiophenol (4-NTP) and the oxygen reduction reaction (ORR) intermediates. The pyroelectricity could be easily generated by the simulated sunlight illumination and was investigated in theory and experiment. The electric field induced by the coupling of pyroelectric and plasmonic effect can effectively tune the hot charge density on the surface of SERS substrate, which further increases the SERS signals and efficiently drives the catalytic process. The proposed measuring strategies of catalytic and SERS enhancement can promote energy conservation and environmental protection.

高效的催化和监测在现代化学工业中起着极其重要的作用。与局部近场增强的平方成正比的局部热电荷密度对于提高催化效率至关重要。然而，仍然需要研究提高催化剂表面的局部热电荷密度的无振动方法。光能是自然环境中最有前途的绿色能源之一。在这里，我们通过吸收光能作为表面增强拉曼散射（SERS）衬底来设计热释电纳米发生器，以现场监测从4-氨基硫酚（4-ATP）到4-硝基硫酚（4-NTP）和氧气的完全氧化反应还原反应（ORR）中间体。通过模拟日光照射可以很容易地产生热电，并在理论和实验上进行了研究。热电和等离子体效应耦合产生的电场可以有效地调节SERS衬底表面的热电荷密度，从而进一步增加SERS信号并有效地驱动催化过程。所提出的催化和SERS增强的测量策略可以促进节能和环境保护。